Typically speaking, this would involve Cardamine found in wrecks or, in another scenario, a new player might scoop up some contraband whilst passing by a ship that was just destroyed by the authorities.
As for going to dangerous areas to blatantly smuggle contraband, there is actually a very profitable route that involves little risk (two of the relevant factions are either neutral or only just hostile to begin with, killing a few of their enemies will fix that if necessary). I won't mention this route, but it's certainly not out of the question in a Rhino.