There seems to be some strange virus or bug going around which sends an email from your friend's/contact's email address to random contacts on their list. I've had the email several times now and they all look the same but with a few different words.
The subject is something like "Fotos 10/07"
And the email will say something like "23:20:22
Essas ficou muito engraçadas as melhores da Festa !
Olha ae.
Fotos 20/06 : Imagens anexadas: <insert three image links here which I won't paste in case any one clicks them>"
(Having pasted that I'm hoping that chunk that looks like another language isn't something like a cuss at one's mother or anything else

) But yeah, don't open the email, if you do, don't click on any of it. Just hit delete. I'm not sure if its just a hotmail thing or if its the same with yahoo/google etc. I'm guessing this will be happening more now :/ The time in the email is exactly that matching when it was sent to you.
Edit: Just googled the bit in another language and it means "These are very funny. The best of the festival!
Look at them."
Which I guess kinda explains a lot. Its like those offline IMs I get from contacts with a link saying "Is that you? HAHAHA :D LOL So funny" so you click thinking there's pics of you somewhere and instead your computer just shacks up with a virus. Fun, fun. No clicky!
Happy emailing and IMing :)