The Canadian Pharmacy gang has added a new repertoire to their arsenal of spam messages. They are using Rich Text Format (RTF) files attached to the messages. Unlike images, most mail clients would not automatically render the RTF files and so requires an external program to run. The RTFs, when opened, looks like this:,”.,”.,””,,”receivea message with a random word as attachment name:.,”.,”,””,””, “”, “receive” and “Receive” the message.”]
Source: https://nakedsecurity.sophos.com/2010/04/30/canadian-pharmacy-rtfs/