This might be useful. The MediaFire terms of service include this line.
QuoteIf your copyrighted or trademarked works are on the MediaFire website without your permission, please contact describing the work that has been infringed, where it is located on the website, and provide your contact information and a statement, made under penalty of perjury, that the information in your notice is accurate and that you are the owner, or authorized by the owner, of the copyrighted or trademarked work. Illegal files will be removed immediately after notice with sufficient information.