This indicates an attack attempt to exploit a Out Of Bounds Read Vulnerability in Adobe Systems Acrobat.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted XPS file. A remote attacker may be able to exploit this to obtain sensitive information from the system, via a crafted XPS file.
Adobe Systems Acrobat 2017 2017.011.30066 and earlier versions on Windows and Macintosh
Adobe Systems Acrobat DC (Classic) 2015.006.30355 and earlier versions on Windows and Macintosh
Adobe Systems Acrobat DC (Continuous) 2017.012.20098 and earlier on Windows and Macintosh
Adobe Systems Acrobat XI 11.0.22 and earlier on Windows and Macintosh
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the most recent upgrade or patch from the vendor: