The text in your subject line is a common case of —where text is incorrectly displayed because the software used the wrong character encoding (typically interpreting Bulgarian Cyrillic as Western European text). When decoded, the text translates as follows:

Be extremely cautious when interacting with .torrent files or download links that use this generic phrasing, especially if they are heavily encoded or appear as spam.

ИЗТЕГЛЕТЕ ФАЙЛ – Mad Max.torrent