No matter how you do it the transfer of any sizable amount of money from that region of the world to the USA is going to trigger high scrutiny from all the agencies with a stake. You might want to talk to a lawyer to find out what you are required to do as there's likely to be some requirements you need to comply with.
I might even give the FBI/IRS a call to ask them what needs to be done, but probably a lawyer is a better first step even if they tell you that you need to notify them about it. Also, have all your ducks in a row as far as why you are to receive this money as they WILL want to know.
My guess is that no matter what you do or how legit this transfer is the intelligence agencies are going to be keeping to well focused eye on you, and everyone you know, from NOW on as it's likely this very conversation has produced the necessary red flags.
In short, now is not the time to be browsing through jihadi websites or searching for bomb making tips...
Brian