Obviously nobody has (even NASA) any doubt that is first alien space craft covered with some ruble rocks over time.
en.wikipedia.org/wiki/101955_Bennu Must me still something interesting inside otherwise Obama would not cancel all Moon exploration program ( named Constellation) in order to pursue now asteroid mission....
On another hand if you want to design propulsion system for small asteroid like that,
the pyramid shape with cut off top will be ideal. If each side could provide thrust, such shape will give potential to steer in any direction without any moving parts ( like modern rockets and jets require now) .
That seems to be logical for me if I build asteroid thruster.