QR code is a type of matrix barcode (or two-dimensional code) first designed for the automotive industry. QR codes are becoming more and more popular today and are used in banners, magazines, transport and badges. But about the malicious QR codes? Yes, you scan a QR code with the help of your smartphone and it redirects you to a URL with a malicious file (APK or JAR) Such QR codes exist and are gaining in popularity. A QR code has a pretty big capacity (compared to a simple barcode) and is able to store 7089 numeric characters.”]
Source: https://securelist.com/malicious-qr-codes-pushing-android-malware/31386/