NT is very good at drawing fouls. Their style of play is somewhat similar to ours, which results in lots of fouls. They are well-coached in rebounding, so that lends itself to some over the back fouls on the opponent. Nothing to really be alarmed at here.
NT is 5th in the country in free throws attempted. Combine that with the fact the KSU is 6th in fouls per game and it's no real surprise.