DLL-Files.com Support Says
Used together with: a "Hack Program" for the game "Dragon City".
WARNING - RANSOMWARE 2013-11-01
Currently many are requesting and searching for a file named df4h0.dll.
From what we have managed to find regarding this file online, it is requested by a "Hack Program" for the game "Dragon City".
This program is used for cheating and main contain malware designed to penetrate your system.