Interesting item in The Hacker News on pirated ebooks now being used by ViperSoftX malware for attacks. There have been proof of concept ebooks with malware for years but looks like they have finally been weaponized though this is more due to using .rar archives to store them.
See
ViperSoftX Malware Disguises as eBooks on Torrents to Spread Stealthy Attacks for more information.