Does Type: Null come with set IVs?

Question

I finished my Type: Null hunt in Ultra Moon and saw its stats. I used Showdown to determine the IVs looking at them alone.

HP: 0-1
Attack: 31
Defense: 31
Special Attack: 31
Special Defense: 0-1
Speed: 16

I used a Careful sync Natu if that matters any. Are my Type: Null's IVs this way because of the sync, is this Type: Null in particular trash, or are all Type: Null genetically engineered to canonically have trash IVs?

Comments

From what I see online, it has 3 guaranteed 31 I’ve and the rest are random, but no hard sources on this.
 Can use pksm to reset the flag and do a mini-trial on this. Remind me on my wall to check this weekend if you don’t get an answer

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Yeah the 3 IVs I figured, but I was wondering if it was 3 perfect, then 2 trash and 1 mediocre.