That is a Polish pre order bonus litho of Shep designed by patryk olejniczak, who won a Mass Effect fan art competition. I think Bioware employed him as a concept artist afterwards.
It's really small (A5) and is on thin paper....No where near the quality as a proper litho....Great image though.
Edit: You can see the rest of Patryk's work here:
http://garrettartlair.blogspot.co.uk/ at his website
Or here at his deviantart page:
http://patryk-garrett.deviantart.com/