Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b62133f1315d14…

MALICIOUS

PDF

34.2 KB Authoring application: Pdftk
MD5: 030e00c0ebcf7d8d4d84b882c0586573 SHA-1: 4282b9ce41672a0fa1ff87a35ea12c2ab993e950 SHA-256: d9b62133f1315d1415febac2ec55cd64c64a7aa90e7fc74b320065b89411e3d8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier further indicate malicious intent. The document body, while containing some obfuscated text, mentions 'abdominopelvic cavity' which appears to be a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://shopsmco.com/uploads/1/3/0/6/130604848/158424.pdf
    • http://mytutoringgroup.com/uploads/1/3/0/4/130476917/b285bc4c618c.pdf
    • http://lianefong.com/uploads/1/3/0/5/130589047/4043184.pdf
    • http://planetwatcher.net/uploads/1/3/0/6/130640010/8987016f0a26f4d.pdf
    • http://re-devine.com/uploads/1/3/0/3/130379210/3150687.pdf
    • http://jsmythwordpressdesigns.club/uploads/1/3/0/5/130589410/33d09ae83c3.pdf
    • http://threestreamsenergypartners.com/uploads/1/3/0/5/130539403/51372020a.pdf
    • http://avivaclayman.com/uploads/1/3/0/5/130539227/2797075.pdf
    • http://adaptingbrains.com/uploads/1/3/0/7/130776688/tekiwoxuzojud.pdf
    • http://easternidahosafetyconsultants.com/uploads/1/3/0/6/130639199/suvafegovirigasiwij.pdf
    • http://www.theraphil.net/uploads/1/3/0/7/130775623/6757449.pdf
    • http://927cu.salon225.com/uploads/1/3/0/6/130603688/130603688.html#what+are+the+nine+regions+of+the+abdominopelvic+cavity

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001a02.bin
40a403f8312ff9c93041e514e965a4d57d797ba541f1da729710ef172887bfc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A02 16060 bytes
font_01_sfnt_off000030cc.bin
3d8ed7dd130d09aa5c3029563d4c37af8cf27be49a739a6cbda9ed527314c4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30CC 6980 bytes

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