This indicates an attack attempt to exploit a Remote Code Execution vulnerability in Adobe Acrobat and Reader.
The vulnerability is due to insufficient validation in the application when loading .exe files from the working directory. A remote attacker may be able to exploit this to load a malicious executable file and execute arbitrary code within the context of the application.
Adobe Reader X (10.1.2) and earlier 10.x versions for Windows and Macintosh
Adobe Reader 9.5 and earlier 9.x versions for Windows and Macintosh
Adobe Reader 9.4.6 and earlier 9.x versions for Linux
Adobe Acrobat X (10.1.2) and earlier 10.x versions for Windows and Macintosh
Adobe Acrobat 9.5 and earlier 9.x versions for Windows and Macintosh
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.