With the advent of the email came the spam- hawking of stock trades, pharmaceuticals, sex, and more. Internet users worldwide are fed-up with glaring at their inbox to find junk mail upon more junk mail. These emails occupy unnecessary space and can prove laborious in regards to deletion. Some of these emails also contain viruses that are designed to cause harm to your computer. With the increase in the amount of spam emails there has also been an increase in the spam prevention and removal technology.
Spam filtering techniques became very sophisticated and for a while it as through spam can be controlled, if not eliminated. However, the spammers were smart enough to continue to spam internet users with newer techniques. Spammers have now begun to attach PDFs to their emails, in an effort to tempt the users to open the files and read whatever content may be enclosed. It is being called the next generation of the pump and dump schemes wherein the spammers put the content of an image spam message into the PDF file and bombard millions of internet users with it.
PDF spam is a recent menace and has started to become as widespread as any other form of spam mail. These emails can't be detected by most spam filters and are thus are able to make their way into your inbox. The attached PDF convinces the recipient to buy stocks of certain company or invest a Rolex watch. The spammers can also embed malicious code into the PDF files wherein problems can erupt once opened. The best possible way to avoid causing harm to your computer is by simply deleting any emails which you find suspicious.
PDF spam shows how spammers will continue to evolve to survive in this industry. As spam tools become even more sophisticated, spammers will be forced to evolve once again and delve into un-treaded waters, as they have with PDF files. PDF spam is slowly but steadily increasing in volume. Spammers have shifted to using PDF attachments as most companies have excellent filtering devices that are readily capable of detecting any kind of image based spam. Image spam was rampant for a number of months before security vendors found a way to combat the nuisance. Now as this is on the decline, PDF spam is catching on. It is imperative that you have multiple filtering systems in place to tackle the problem of PDF spam.
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