diff --git a/verify.go b/verify.go
index f09e272..d4a8832 100644
--- a/verify.go
+++ b/verify.go
@@ -210,8 +210,13 @@ func parseSignedData(data []byte) (*PKCS7, error) {
 	// Compound octet string
 	if compound.IsCompound {
 		if compound.Tag == 4 {
-			if _, err = asn1.Unmarshal(compound.Bytes, &content); err != nil {
-				return nil, err
+			for len(compound.Bytes) > 0 {
+				var cdata asn1.RawValue
+				if _, err = asn1.Unmarshal(compound.Bytes, &cdata); err != nil {
+					return nil, err
+				}
+				content = append(content, cdata.Bytes...)
+				compound.Bytes = compound.Bytes[len(cdata.FullBytes):]
 			}
 		} else {
 			content = compound.Bytes
diff --git a/verify_test.go b/verify_test.go
index cd7d32e..2d564a2 100644
--- a/verify_test.go
+++ b/verify_test.go
@@ -6,6 +6,7 @@ import (
 	"crypto/rsa"
 	"crypto/x509"
 	"encoding/base64"
+	"encoding/hex"
 	"encoding/pem"
 	"io/ioutil"
 	"os"
@@ -595,3 +596,120 @@ but that's not what ships are built for.
 	}
 	os.Remove(tmpContentFile.Name()) // clean up
 }
+
+var sampleAppleAppAttestationReceiptFixture = []byte(`
+-----BEGIN -----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+-----END -----`)
+func TestParseSignedOctetStringWithAppleAttestation(t *testing.T) {
+	decodedReceipt, _ := pem.Decode(sampleAppleAppAttestationReceiptFixture)
+	p7, err := Parse(decodedReceipt.Bytes)
+	if err != nil {
+		t.Fatal("could not parse receipt containing compound octet string", err)
+	}
+	expectedContent := "3182040b3023020102020101041b38594532334e5a5335372e636f6d2e6b617961" +
+		"6b2e74726176656c308202ee020103020101048202e4308202e030820266a00302010202060174d666da10" +
+		"300a06082a8648ce3d040302304f3123302106035504030c1a4170706c6520417070204174746573746174" +
+		"696f6e204341203131133011060355040a0c0a4170706c6520496e632e3113301106035504080c0a43616c" +
+		"69666f726e6961301e170d3230303932373230323831385a170d3230303933303230323831385a3081913149" +
+		"304706035504030c4035363737656138643261373461643663623261386438366237653166626466633838346" +
+		"232326635656536313333633039383931313534333039373837363461311a3018060355040b0c1141414120436" +
+		"57274696669636174696f6e31133011060355040a0c0a4170706c6520496e632e3113301106035504080c0a436" +
+		"16c69666f726e69613059301306072a8648ce3d020106082a8648ce3d03010703420004953177c14369f5844460" +
+		"c9fd75de5586b2d2171c86de88b262fa8218c998ff6aa3463c00895929912bfbf907aeee6766d9acd352a11af02" +
+		"72a0d8b07ab46f99da381ea3081e7300c0603551d130101ff04023000300e0603551d0f0101ff0404030204f0307" +
+		"506092a864886f76364080504683066a40302010abf893003020101bf893103020100bf893203020101bf8933030" +
+		"20101bf89341d041b38594532334e5a5335372e636f6d2e6b6179616b2e74726176656ca5060404736b7320bf893603" +
+		"020105bf893703020100bf893903020100bf893a03020100301b06092a864886f763640807040e300cbf8a780804063" +
+		"1342e302e31303306092a864886f76364080204263024a1220420c9af9814b5d3a082080d25f82d8885c8982ad4a72a9fb5a8" +
+		"69afe7dec4ab257d300a06082a8648ce3d0403020368003065023100b6c55d80f9ef63f7a8a9841e86dd59b9ddfcccc3e959f" +
+		"cb9602801ef672e8ade03429f231ebfcfceefd4f088717106a702303c27781acdecfd9112d15574f8dd1854aa250d404b6549b5" +
+		"7df55511d9cd8ec53512eac933ea92e17dc676b2e8d5a56330280201040201010420bddace389020162bfc3cec0d82042a8eee" +
+		"bc73cb0fdcf9b50bde03a476329d66306002010502010104582b65593453536e4f6a64696b2b5869336942532b536b47565347" +
+		"4d3836694a79505361632b6e7531754f7877666f54414b6d7838536374335872426a2b7a762f704f64554a6877327a37713648" +
+		"38477a6f2f7a426d773d3d300e02010602010104064154544553543012020107020101040a70726f64756374696f6e30200201" +
+		"0c0201010418323032302d30392d32385432303a32383a31392e3934325a30200201150201010418323032302d31322d3237" +
+		"5432303a32383a31392e3934325a"
+	if hex.EncodeToString(p7.Content) != expectedContent {
+		t.Fatal("could not parse contained compound octet string content fully")
+	}
+}