Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c091ffd675d20a8…

MALICIOUS

PDF

37.7 KB Created: 2020-08-17 18:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1150221d0ae826436774c9a27590cea SHA-1: 6a3ef2b13c3938e66cdb999554da9a6891d76588 SHA-256: 4c091ffd675d20a898b292f560371401d28e9d6b549012633e3f683cd7ad6add
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=blauberg+turbo+100+manual'. This URL is presented within the document body, disguised as a manual, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous external links, including one to a Shopify domain. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.cc/pify?keyword=blauberg+turbo+100+manual
    • http://files.meadowlodgebiblecamp.org/uploads/1/3/0/8/130874197/zinowofojenebu-sasupa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/will_johnston_s_puzzle_pointers.pdf
    • https://cdn.shopify.com/s/files/1/0448/0126/1730/files/hemangioma_hepatico_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/79494167225.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/kojagiredilababe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/33804122169.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/dujalugalitojoxugatawe.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/ruzatejuliganaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/time_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0441/2583/files/wobipepepewudofuxufim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047f5.bin
79be7d2abc1ee036fd09abfa28677bed318889a3a869261eb77787308f97599a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F5 5044 bytes
font_01_sfnt_off00005905.bin
2fddf06394cf839fac975eeff49ecf025a04ab981e1acde433a761e626942256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5905 10328 bytes
font_02_sfnt_off00007c44.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C44 4324 bytes

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