Answer: positive
Explanation: according to newton's second law of motion, the applied force (pull) will produce a motion for the box defined by the formulae
f = ma, where m is the mass of the box and a is the acceleration.
But due to friction, a force of the same magnitude but opposite in direction to the push is applied, hence we have that
f - fr = ma
Where fr is the frictional force.
As we can see from the formulae, f (push) is responsible for a positive work while fr (friction) will bring about a negative work done.