strongly convert svg file to pdf extension error

Hello,
I use this module for long time for our company project!
especially, i usually use pdfinfo for getting permission.
recently, when i test for this, discover some problem.

I convert svg file extension to pdf(test.svg -> test.pdf) and run it in pdfinfo.
pdfinfo recognize it pdf and go to no complete state(don`t go callback...)  lol

help me plz....
