On the one hand, the large scale structure of matter is arguably scale invariant, and, on the other hand, halos and voids are recognized as prominent features of that structure. It is desirable to have a conceptual framework capable of taking both aspects into account. Therefore, we propose to model the dark matter distribution as sets of fractal distributions of halos. This model relies on the concept of multifractal as the most general scaling distribution, and on a plausible notion of halo as a mass concentration in a multifractal. Hence, we find connections with the log-normal model of the mass distribution and with the Press-Schechter mass function. The notion of void can also be reinterpreted according to this picture, providing new insight into their meaning. This model of fractal distributions of halos is supported by a numerical study of the distribution produced in the GIF2 N-body simulation.