The pdf file is corrupt. You need to get either a new copy or a new version needs to be created.
I too faced the same problem..
The problem was that i used the method of pdfContentByte --> beginText()
and forgot to use endText().
SO i was getting the error..
Hope this helps
I encountered this error when I had to put the JPEG images in my PDF and I was using
.beginText() and PDPageContentStream.endText()(from Apache PDFBox) unnecessarily
Once i removed these two, error disppeared. Hope this helps...