Yes it can, because all the transactions of bitcoin are anonymous and the corrupt people needs such type of platform to save their black money and to transfer them anywhere without taxes and without government consideration. Everything can be use either in positive of negative way, this is the negative use of bitcoin to do corruption.
I think there's no need to cover up on this, bitcoin is famous all over the world and bitcoin is well known on the black market that bitcoin is a good currency for illegal activities and without you knowing already many people are using bitcoin for illegal transactions, it might also be corruption