Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6344c01a90801c9…

MALICIOUS

PDF

46.4 KB Authoring application: Pdftk
MD5: 00fc17c036253fa15ac4c0e008bdf1a6 SHA-1: ad535fd7efd8549574e8fda0cbf0b0008ed5d022 SHA-256: b6344c01a90801c970c80c8f9bdfd7eaed0acc90fda6ee66e5e8188cbaa86e5c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The primary attack pattern involves redirecting users to a link farm, likely to serve phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://kibusitika.dycraft.net/uploads/2020/01/29/zogakulexamiw.pdf
    • http://soundscapist.com/uploads/1/3/0/6/130605074/lisinedini.pdf
    • http://mytexanlife.com/uploads/1/3/0/5/130539450/8aaca6ddb.pdf
    • http://whateverwelding.com/uploads/1/3/0/2/130270740/poleranemo.pdf
    • https://kifogipifi.weebly.com/uploads/1/3/0/5/130551708/buwuzelon.pdf
    • http://danhixsonphotography.com/uploads/1/3/0/4/130489358/7234737.pdf
    • http://doranasibe.vv6vv.top/uploads/2020/01/28/700539.pdf
    • http://333diamondwholesale.com/uploads/1/3/0/6/130604775/9d5f1a32a20e1.pdf
    • https://gekogosoz.weebly.com/uploads/1/3/0/2/130289226/zoxasimexav.pdf
    • http://bevopo.mummys-gold.ru/uploads/2020/01/28/rejoxufiwokuku.pdf
    • http://prostatecurefoundation.com/uploads/1/3/0/6/130621460/sipetexixukugix.pdf
    • http://cpsplantscapes.com/uploads/1/3/0/5/130538842/tazeg_logezuzi_pesabavanilawu.pdf
    • http://cocominksstore.com/uploads/1/3/0/6/130640006/9389524.pdf
    • https://duravuxeku.weebly.com/uploads/1/3/0/2/130289679/211324.pdf
    • http://longspeakchog.org/uploads/1/3/0/2/130289765/simutubarum-berijowipepax-zixopalalem-vivolozofe.pdf
    • http://mofaj.vipiski-besplatno28.icu/uploads/2020/01/28/zavekorupaxezojole.pdf
    • http://nfctigers.com/uploads/1/3/0/5/130550867/gopujoladudefuburedi.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/6/130603709/130603709.html#adventure+of+tintin++full+movie

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001558.bin
151bc5fe3e962fa2c4f5dc1d881e4f1d6c2edcae747ebf8fcdf254aa440486bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1558 9128 bytes
font_01_sfnt_off000064ea.bin
51e3eae5473be84cd2530226f650c7ef71ad858e7b706c087b2ee86d5dfe28ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 13392 bytes

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