There appears to be an increase in emails with just a subject and a link in the message body.

If you see such mail, keep your itchy fingers (and mouse pointer) off that link and delete the mail immediately.

Do not click on the links. Some examples of subject header includes:

“I found you a job”
“Spring Savings”
“Earn up to $35,000 per year”

Check the links before clicking. If it points to an unknown site, then its just web shit – delete them and flush them down the virtual toilet.