What file types are safe to open?
PDF files. Images (jpeg, gif, png) Audio files (mp3, wav, wma) Video files (avi, mp4, mpeg)
What file types should never be opened?
In addition, do not open email attachments that have file endings of .exe, . pif, or . vbs. These are filename extensions for executable files and could be dangerous if opened.
What file attachment is not secure to open?
Archive files, PDFs, Microsoft Word documents, and Microsoft Excel spreadsheets have been used in many malware attacks. However, attackers are not limited to these file types. Anything from images to text files can be dangerous. One of the most obviously dangerous file types is the executable file.