Which marketing specialization requires less social interaction?

[Ghostlight]

Brand Management,
or
Account Planning,
or
Market Research,
or
Media Management ..

I think it's market research, but I've very less idea.

[Jthg Vhgv]

Try freelancing. That's really the only way. There are plenty of services (like Freelancer) through which employers hire freelancers through the Internet. The potential jobs are data entry, programming, graphics design, marketing, customer service, transcription, writing, etc. Check it out.