There is a Turbosmooth modifier on the object (in viewport – iteration 0 in render – iteration 1). In OBJ the stack is collapsed.
Sofa with blanket and pillows in a group.

Sofa size 1380x890x840
Sofa – (Polys 12565) blanket and two pillows – (Polys 8061) without Turbosmooth modifier shown on the grid.

The file contains 7 colors of sofa fabric but the colors can be easily changed to any through Color
(except accessories).

https://www.divan.ru/irkutsk/product/divan-kela-mini-velvet-beige