It's definitely a scam. See Tralboy's post in this forum "Question Money Order scam" to see what is likely to happen if you take up the 'offer'. They are banking on you not getting caught too quickly so that you can send them money before your bank picks up on the fake cheques leaving you either hopelessly overdrawn and/or prosecuted for passing fake cheques. Around 80 of these scammers were arrested a couple of days ago with thousands of fake money orders and cheques destined for the UK (nearly £8million) just waiting to be sent out to victims. Unfortunately 80 is just a drop in the ocean and there are plenty more just waiting to take their place.
As a rule of thumb I am suspicious of any email that does not have my name e.g "Hello friend" (if they were my friend they'd know my name). There are of course other signs such as poor spelling and grammar (as this one has) free webmail accounts like yahoo or gmail being used by companies (again like this one) and of course any unsolicited job offers.
Stay safe
Watchman