The file does not appear to be a widely recognized mainstream application or a standard version of popular "MFF" apps like Marvel Future Fight (which currently uses versioning in the 11.x range). Given the specific version number ( 0.5 ), it is likely either an early-stage development build (Beta/Alpha), a specialized utility tool, or potentially a malicious file.
: "MFF" is sometimes used as shorthand for "Match Filter" tools in football (soccer) analytics. Safety and Content Warning File: mff-0.5.apk ...
: Before interacting with it, upload the file to a service like VirusTotal to check it against multiple antivirus engines. Development Context MARVEL Future Fight - Apps on Google Play The file does not appear to be a