Halloween is often a time for executing tricks and scares and spam emails are no exception, as proven by this spam sample Trend Micro received recently. The message purports itself to be from the Navy Safety Center, bearing a .PDF attachment that supposedly contains the holiday's briefing points. The attachment is actually Trojan malware, detected as TROJ_PIDIEF.ECZ, and should not be accessed under any circumstances.
Special events and occasions are used by cybercriminals to trick users into becoming their victims. Users should always take caution with unfamiliar emails sporting suspicious attachments, no matter how innocent-looking they may seem at first.