Today I bought a PR4 domain. I really don't know what to do with it. I got 5 US visitors within 2 hours without doing anything till now. Its related to loans but the name is related to pharma. So I am bit confused as how to go for marketing and what to do with this domain to make me some money with it. Backlinks site rejected my website giving me reason as there are no backlinks for this site. I am waiting to approve it by infolinks. Please suggest me what you think of. It may be anything.
First, I guess you already trapped into a mislead sales later before you bought the domain. if a backlink site gave you information that your domain has no backlink, it can be said that soon your domain page rank will be dropped to zero. My suggestion is build more backlink first lead to your domain. if your domain is aged, I think it wont be a problem for the domain to get a "quick backlink blast". However, it is still risky if you use xrumer to get the job done.
Sell text or banner links. If it has low OBL (outbound links) and have good alexa rankings, you can generate money from it.
Yes, I think this is a good suggestion if OP could not decide on what to do with it yet, otherwise this is a very good online real estate that can make some money soon if taken cared correctly.