破烂 is an attributive adjective describing objects that are old, damaged, and shabby — tattered clothing, worn-out furniture, dilapidated buildings. In colloquial speech it can also stand alone as a mass noun meaning 'junk' or 'scrap' (捡破烂, 'to scavenge junk'), but the adjective sense is the primary one and the only sense that fits the attributive (attr.) POS tag.