Sure, there are a lot of strangely warped buildings out there, but not this one. The pic you posted is the third view I've seen, each from a different direction. Looks symmetrical by rotation (90 degree increments) through the vertical axis.

The plan of the top and bottom floors is a simple square, like either of the Twins. As you go up, the corners of the square are clipped at 45 degrees, a little more each floor until one of them is a perfect octagon. The change in shape continues until the top floor is a square again, with its orientation rotated 45 degrees from the bottom.

[all deduced from the exterior renderings, btw]

No acute angles -- hard to clean, and harder to design within -- and plenty of interior core volume that can stay "typical" (as the A&E types say) all the way up.