I too got that email, checked the files in isolated machine.
The password.txt is a exe file with trojan.
But the wallet.dat file is true & it has 30.28 btc, but the wallet is encrypted.
The coins received from frosty wallet & it has another 3 addresses, which has label assigned to it.
It seems the scammer sent real wallet, encrypted, so that he dont loose coins, but want others to loose coins.
Indeed the person who seems to originally own the wallet is Liquid00 on the forums, also on the litecoin aus website.
he sent 19btc to this wallet at some point.