Laxotrade is a website that spams everyone that has any recent bitcoin trades. They send a very small amount of coins to everyone to try to bring people to their website through advertising.
Since Laxo sent a very small amount to the hackers address it was probably just because they saw his address in a recent trade. It's not like the hacker sent bitcoins to laxo...
:)Thanks for your reply, but there is a question why they cannot tell us the user information of this suspicious address.
Because they just take any address out of the blockchain and send spam transactions there. They know as much about the address as anyone else seeing it in the blockchain.