Hydrogen bromide is covalent. Pure HBr has a melting point of -114.20C and a boiling point of -85.10C. The molecule has a dipole moment which is due to the poalr nature of the chemical bond. In water HBr is a strong acid, hydrobromic acid, and is pretty well completely dissocaiated.
HBr is a polar molecule: dipole-dipole forces. There are also dispersion forces between HBr molecules. The hydrogen bond is a special dipole-dipole interaction between the hydrogen atom in a polar N-H, O-H, or F-H bond and an electronegative O, N, or F atom.