Malicious PDF — malware analysis report

Static analysis result for SHA-256 0431d2208ebbfb3a…

MALICIOUS

PDF

133.1 KB Authoring application: GIMP
MD5: 946306d76d4820ca2ce0cdad01eb234e SHA-1: 090c3e640fe0fd0a6086d90ed7effc036ad5b4e9 SHA-256: 0431d2208ebbfb3af7a71e274d764b523582e7a2c835b91027c38f02184c2e44
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or to distribute a large volume of content, potentially malicious. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or traffic-driving intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mssavellsclass.com/uploads/1/3/0/7/130739363/7843221.pdf
    • http://indierockgear.net/uploads/1/3/0/6/130639945/fidusote.pdf
    • http://leadershipandstrength.com/uploads/1/3/0/6/130639175/1ca6fc66.pdf
    • http://cedartowalnut.com/uploads/1/3/0/5/130589088/7898103.pdf
    • http://politicalresearchassociates.net/uploads/1/3/0/8/130814250/7483891.pdf
    • http://novel-furniture.in/uploads/1/3/0/4/130435784/7590633.pdf
    • http://trimotodistribution.com/uploads/1/3/0/6/130605116/rolonemofutow-fejogifixil-mezufejimu.pdf
    • http://caiartdesigns.com/uploads/1/3/0/3/130379213/sowaguzepunuxaz.pdf
    • http://thedivinemysteryfort.com/uploads/1/3/0/7/130738978/92b2eb600.pdf
    • http://bcdrywall.org/uploads/1/3/0/8/130873826/livirenotu.pdf
    • http://be-your-best.dk/uploads/1/3/0/4/130489909/130489909.html#charles+dickens+great+expectations+full+movie

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f8.bin
842ffdd354acd53e84072dc0ed51d5580020763428ea6139871e8b14e1d638f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 11164 bytes

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