I don't think there were enough clues in the books to answer this, but I also know that there have been hundreds of times when J. K. Rowling has given talks and interviews and talked about her characters, so maybe she's said something about this.
Even though the Malfoys have behaved contemptibly at times, they do draw the line. Draco couldn't kill Dumbledore and they walk away from the Death Eaters toward the end, even though it might not have been safe to do that in the long run.
Is there anything that tells us what kind of man Draco Malfoy grew into? I think the last scene makes it clear he and Harry are at least able to acknowledge each other without hatred, and might even keep in touch, but that's all we see.
Has anything else been revealed about what he's like as an adult?