ftpcutrs2.dll is a dynamically linked library. In simple phrase, it is an essential component of a particular parasite. Most threats depend on such libraries and wouldn't work without them. The ftpcutrs2.dll file can be responsible for the dangerous payload a parasite carries, so deleting it will definitely reduce all the security and privacy risks.
The ftpcutrs2.dll file is installed and used by adware
AdGoblin.
Sometimes a presence of ftpcutrs2.dll does not indicate that your computer is infected. It can be an essential system file or a file installed by harmless legitimate software and therefore may not pose any threat to your privacy and the system. Although such cases are quite rare, you should thoroughly examine ftpcutrs2.dll before completely deleting or leaving it in the system.