PDF to CDR

There is PDF file with password with vector graphics, obviously made in Corel. We removed the password. Then, on trying to open or import in Corel, popping up a message that the file is corrupted… What I’ve done. Downloaded from the website of the manufacturer and tried Ghostview… I transferred in PS format. Everything is good, but only Coral doesn’t open it. Perhaps someone has thoughts how to solve this problem… Thanks in advance!