Helping people with computers... one answer at a time.
One of the very first things that I would be concerned about is your print-to-PDF technology. I'd be concerned that it was downloaded from a questionable site.
From my computer, I had to print out a PDF file. When I printed, two pages of porn came out before the PDF file. I hope other info that I have faxed to others didn't include those pages. How could this be? Yes, I've looked at porn sites, why lie? This did happen too though. Not funny.
In this excerpt from Answercast #62, I look at a case where extra, embarrassing material is printed out with a PDF file.
You're right it isn't funny - and I can think of basically two things that come to mind.
One is: I'm not sure where the driver you got for printing to PDF came from. One of the very first things I would be concerned about is your print-to-PDF technology wherever it comes from (if it's not originally a part of the operating system, or in the case of Chrome, part of the browser). I'd be concerned that it was downloaded from a questionable site - and included this additional "feature" along with the actual print-to-PDF functionality.
The other piece of this is that I would be concerned about the PDF itself. I don't know where you got the PDF file. Where it came from and what it was supposed to contain? It is possible that the PDF itself came with that additional information up front. It's difficult to say.
There are many possibilities here, but those are the two things that I would consider first, especially if you are in the habit of surfing these kinds of sites.
You do need to be extra careful about malware of various flavors on your machine:
Definitely, scenarios that allow rogue printer drivers to be installed;
Other forms of malware;
And again, depending on where the PDF itself came from, that's a place to be
concerned about as well.
Next from Answercast 62 - Can you recommend an anti-virus tool that will work in a 256MB system?
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