North Korea is the most hermetic and opaque country that exists today. The dictatorship established by Kim Il-sung, the grandfather of the current dictator Kim Jong-un, has succeeded in isolating the North Korean population from the rest of the world to ensure its survival.
With everything and that, in one way or another there are companies from the rest of the world that have done business with North Korea. Some have done better than others, but it is likely that none have done as badly as Volvo at the time. And is that North Korea stole 1,000 cars from the Swedish manufacturer. So, just as it sounds.