You cannot attach any kind of file to an e-mail campaign. Attaching files to campaigns will cause your mailing to get blocked by every ISP, so we do not permit our clients to do this.

If you have a JPG or GIF file, you can insert this image directly into the body of the e-mail campaign. Look here for a guide.

A PDF is best hosted on a website so that your subscriber's can download it to their desktop.