Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2a37a83f6fb773…

MALICIOUS

PDF

47.9 KB Authoring application: Adobe PDF Library 9.0
MD5: bed3c86319b05f083a80bb72f31e6871 SHA-1: 9b62303699ee60da014f92b2ad7d8792301ebb77 SHA-256: fa2a37a83f6fb773b448ce866268b2ed4b620b4840991bfeae46f3a41dad7013
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, also contains some of these URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://efwpartners.com/uploads/1/3/0/5/130550940/disize_juvurerejuwobub_tijutizo.pdf
    • http://togetheras3pointone.com/uploads/1/3/0/3/130379202/6260081.pdf
    • http://shutupimgay.com/uploads/1/3/0/6/130639468/f8c6320bfbbf3.pdf
    • http://musigep.org/uploads/1/3/0/6/130639603/kojawem.pdf
    • http://bootsalebonanza.com/uploads/2020/01/29/4821079.pdf
    • http://zimpresos.com/uploads/1/3/0/5/130551585/7813002.pdf
    • http://mozevoj.cserv.org/uploads/2020/01/28/zukoxirov.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/3/130323400/newesipokafok_debijipadu_xupajisa.pdf
    • http://vyhodnew.ru/uploads/2020/01/28/96086f8709.pdf
    • http://nc-zeitgeist-foundation.org/uploads/1/3/0/5/130590261/kozotaro-ridixu-juzuruzuvaze.pdf
    • http://luferokuze.lechenie-psoriaza.ru/uploads/2020/01/28/tojez-pudebuzik.pdf
    • http://allergy.mediutopia.com/uploads/1/3/0/6/130640178/130640178.html#formalist+literary+theory+definition

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000137c.bin
5d77fb02649d03794afd2c19e217350e13a0b117f62e643dfe0dc5747b47f320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137C 9136 bytes
font_01_sfnt_off00006a94.bin
7fa43e5990456be5ececbe0c073fbb19ebf1ea433bec0cd488ce3e4b9bf97d39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 16440 bytes
font_02_sfnt_off00008067.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 2600 bytes

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