about cashier check or wire transfer, disdant buyers responding to my job want add

someone answered my add on craiglist, for a job clean houses they sent me a cashier's ckeck in the mail fex over night for two thousand dollars to me to go clean there house and pay the landlord his rent because they are not in the united states just got married and on honeymoon. moveing to the united state august tenth and want everything to be ready when they get here. is this a scam. its bank of america and the name on the ckeck is hyungook shin 12340 felson pl cerritos,ca 90703 and signed by him. I called the bank and asked if this person had a account there they said yes. the fed ex address is dove pharmacy 675 broadway n. tulsa or 74115. called the phone operater and said there was no such address. and he wants me to deposit in my bank. wit for it to go threw and wester union the landlord his money. name is james micheal adkins city:tulsa :state : ok zipcode:74115