NK is a money launderer

They produce these huge statues for African Nations (its their #1 export) and when African nations can't pay, NK settles for land that is full of mineable goods: http://www.slate.com/blogs/atlas_obscura/2014/08/04/the_african_renaissance_monument_in_dakar_senegal.html

NK takes in TANGIBLE goods in forms of payment from African nations for Arms, architecture/infastructure, military training etc.

NK's relationship with Africa dates back to the Korean war, they were allies.

NK is reported to have 2.2% of the economy of SK. 2.2% is probably for a number of reasons= tangible goods aren't as traceable and "Truman show".

https://www.federalregister.gov/documents/2016/06/02/2016-13038/finding-that-the-democratic-peoples-republic-of-korea-is-a-jurisdiction-of-primary-money-laundering