http://z27wmjswte2mic5n2xvwexbzirxjgbhelx2ut6nynv3gmknzzc454lad.onion/blog/can-a-bitcoin-address-be-traced.php
Wallet addresses on exchanges can be assessed. And when this is done, hackers (or whoever) can easily create a link between the address on the exchange and the wallet which made the transfer. Interestingly, companies such as Chainalysis and CipherTrace have commenced analysis which traced certain wallets to criminals and other notable real life figures.