Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbd3d0acd00bf33…

MALICIOUS

PDF

34.8 KB Created: 2020-08-06 16:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: debaf6d2d6c489cda38532c97bbd9d58 SHA-1: 0455edd9633e507f695c0b54cb029aca13e921a4 SHA-256: 0bbd3d0acd00bf338135349bb49ee1bf57c4c051ac6da168ff6a76b2c94534ef
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body also contains numerous links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=agendas+2020+19+pdf+gratis
    • http://files.amosiowa.org/uploads/1/3/1/8/131871648/tobav_nusije_kobulipop.pdf
    • http://files.fernhouseembroidery.com/uploads/1/3/1/4/131483307/aef91b6d23b.pdf
    • http://files.chasevelez.com/uploads/1/3/0/8/130814676/2143519.pdf
    • http://files.kerryltownsend.org/uploads/1/3/0/7/130740521/kininobujak-tamevejizagimaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/xoxafosafu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/37171433592.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/19145163807.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/renuragaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/80324873630.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/29350873855.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/past_authoring_program_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/vulokasizuvaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/xojoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/83805815568.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004931.bin
6024418095ade84ddcead77335dd14b57f802c70745a834a86d915fde01b4faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4931 5648 bytes
font_01_sfnt_off00005c81.bin
8e394d6c623bd3638aba1d19e6315f0e5b56b6af18b7d36e92ff951b4b710ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C81 10016 bytes

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