This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.
The virus works by exporting virus code to your hard disk and configuring Acrobat to import this virus code into each .PDF document that is opened in Acrobat. When a document is saved on the infected system, it becomes a carrier for this virus. The methods used by the virus do not work on the Macintosh systems, however they can be a carrier of the virus when receiving an infected document.
The virus contains the string Your_Death
Infection summary (similar to a macro virus):
The detection and removal of this malware requires an extra.dat, which is available upon request.