Who has time to create 1400 Addresses so as to split the 1400 bitcoins? 
A hacker would be the last person you would expect to do this when there are a couple of good bitcoin mixers right under his nose. Just a couple hours and what the wants has been done by the mixer
One of them is walletexplorer.com, it's able to link addresses from one HD wallet so even if one tries to generate many addresses using one HD wallet (This is the easiest way to generate 1400 BTC addresses) It will be no work done
A hacker would be the last person you would expect to do this when there are a couple of good bitcoin mixers right under his nose. Just a couple hours and what the wants has been done by the mixer
If he send 1BTC to 1400 owned addresses, though, no one can prove that the person that owns those 1400 addresses is the hacker, right? They can only ask them where did you get that one bitcoin.
There are some chainlysis tools that are even said to be able to unmask the source of mixed bitcoins. Imagine how easy it will be to trace the source of the tinted 1400 BTC even in different addressesOne of them is walletexplorer.com, it's able to link addresses from one HD wallet so even if one tries to generate many addresses using one HD wallet (This is the easiest way to generate 1400 BTC addresses) It will be no work done