Sorry I just saw this. I assumed you were talking about the Soleimani assassination. Unfortunately the wiki article doesn't talk about the payload, but I remember seeing the aftermath pictures on 4chan, and I believe this quora (ick) answer is describing the same thing.

The Hellfire R9X, also known as the “Flying Ginsu” after the knives advertised in campy infomercials, kills its enemies by flying directly at them, popping out several steel blades at the last moment to slice its targets into bits. The missile is used by the Central Intelligence Agency to target specific individuals without risk to nearby civilians and other noncombatants.

I used manhack as a reference to Half Life 2 which has so-named flying blade drones that kamikaze into enemies. :)