|link| - Adberdr11010-en-us.exe

Final verdict (short and spicy)

Adobe Reader XI reached in October 2015 and no longer receives security updates. Known vulnerabilities in version 11.0.10 include: adberdr11010-en-us.exe

While the software is obsolete, the specific file you have might be legitimate or it might be malware masquerading as the installer. Final verdict (short and spicy) Adobe Reader XI