FreepdfConvert is a site which allows you convert Microsoft Word, Excel, PowerPoint, Images, and many other file formats to PDF format for free. Following is the list of supported file formats:-

    You get a link from somewhere which is nothing but a clutter of letters and digits and since you cannot visually decipher its contents, you click it.  The link may be a scam, may be someone trying to cheat you or may be someone trying to inject viruses or malware into your computer.