This indicates an attempt to exploit a Code Execution vulnerability in the Adobe "get_atlcom" Class.
The vulnerability, which is located in the "gp.ocx" ActiveX control, can be exploited through misuse of multiple vulnerable properties. It may allow remote attackers to execute arbitrary code on vulnerable systems.
Adobe Reader 9.2 and earlier versions for Windows, Macintosh, and UNIX.
Adobe Acrobat 9.2 and earlier versions for Windows and Macintosh.
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the patch supplied by the vendor: