Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf17e18a59152836…

MALICIOUS

PDF

32.0 KB Authoring application: Solid Converter PDF
MD5: ccdd67fa033530953e84751321e2a3f1 SHA-1: 1639d8acece380c3bb98cbfef014ef3bd34a1633 SHA-256: bf17e18a591528361a011fccae6783dab870165f6d0a13ebc687156643549925
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a malicious intent related to traffic generation or phishing. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://tararebad.audiostart09.icu/uploads/2020/01/27/7773894.pdf
    • http://aroxj.info/uploads/2020/01/28/lezale-sinugefuroninuf.pdf
    • http://tbplaycomhynglgkfx.weebly.com/uploads/1/3/0/6/130639622/jafurineboxi_puvomisoguri_rubetadux_vesovogugazitub.pdf
    • http://lakotatilestudio.com/uploads/1/3/0/6/130603937/3919604.pdf
    • http://pathblazer.org/uploads/1/3/0/2/130271195/6164469.pdf
    • http://carlykade.com/uploads/1/3/0/4/130476200/e2f3e.pdf
    • http://wulul.kazan-mice.ru/uploads/2020/01/28/2856887.pdf
    • http://legowatu.kasperplus.ru/uploads/2020/01/27/ab2b673dc6ede23.pdf
    • http://lavoba.ecorutas2x2.com/uploads/2020/01/28/mazekujugi_jovoz_tovika_potibugivasav.pdf
    • http://fotodom-rzn.ru/uploads/2020/01/28/96730120975b.pdf
    • http://dad.tht-premiere.online/uploads/2020/01/27/dukutixodegafuwu.pdf
    • http://rooflocators.com/uploads/1/3/0/6/130621622/989c438349e9fe0.pdf
    • http://rqacommittees.com/uploads/1/3/0/6/130604300/3028235.pdf
    • http://zesagaj.dvoryansky.ru/uploads/2020/01/28/893162c2e.pdf
    • http://fuw.autogost.com/uploads/2020/01/28/zifiditabox.pdf
    • https://jupedisa.weebly.com/uploads/1/3/0/5/130541763/lizizuf.pdf
    • http://acouturelife.com/uploads/1/3/0/2/130287881/130287881.html#abcd+nursery+rhymes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001439.bin
280cc808a2b27618b6c323d9c98dc09f429ad7905a8fdb3dfd9210ba7cf29a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1439 7940 bytes

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