Issue in retrieving pdf Signature Information

The attached PDF file cannot be processed by Aspose.  The ClassCastException (shown below) happens with 9.0 and 9.3 versions.  Is there any workaround for this, in case this is a bug in Aspose.

 java.lang.ClassCastException: com.aspose.pdf.kit.oe cannot be cast to com.aspose.pdf.kit.my

       at com.aspose.pdf.kit.xa.<init>(Unknown Source)

       at com.aspose.pdf.kit.h.<init>(Unknown Source)

       at com.aspose.pdf.kit.pd.M(Unknown Source)

       at com.aspose.pdf.kit.PdfFileSignature.bindPdf(Unknown Source)

       at com.aspose.pdf.kit.PdfFileSignature.bindPdf(Unknown Source)

       at gov.nih.era.sciencecv.pdf.metadata.AsposeXMP.verifySignature(AsposeXMP.java:40)

       at gov.nih.era.sciencecv.pdf.metadata.AsposeXMP.main(AsposeXMP.java:85)