Well... I work as a malware researcher. I specialize in other types of malware, but I have encountered and succesfully analysed pdf malware before so I know what to do.
Please send me the sample before choosing your freelancer. Send it even if you don't choose me, because I'm curious about the work which needs to be done for this kind of money.
Alsoe, I may be able to do it in much less time, but I can't give you an accurate estimate without the file.
Thank you!