The use of malware-laden PDF email attachments has spiked in recent months, internet security company SonicWall has found
. Over the course of 2018, SonicWall detected 47,000 new attack variants using PDFs, while they observed more than 73,000 of these variants last month alone. 67,000 of these PDFs linked to scammers, while 5,500 contained links to malware downloads.
Refer Here for Original Post and Source https://blog.knowbe4.com/pdfs-return-as-phishbait