The model is created by ILM Senior Creature Modeler Enrique Sagasta.
Take a look at this awesome dwarf created by Industrial Light & Magic Senior Creature Modeler Enrique Sagasta in ZBrush, Maya, and Arnold.
The fine little skin details are especially stunning. The author is still working on it, this is the progress so far:
The project is based on concept art by Ivan Dedov:
Here are some other works from Enrique Sagasta: