Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4c1d06d8681810…

MALICIOUS

PDF

40.2 KB Created: 2020-08-16 17:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cf6c72ef4ff3d58a69ba26e8538a21d SHA-1: c8e01440ce9e1d90b208b7cf8b96b6bb44c21750 SHA-256: 8f4c1d06d8681810fd63c5365db095f1a3233a19ff1413362f67132712391d0f
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources, a common tactic for SEO poisoning and link farms. One prominent URL, 'https://ttraff.ru/pify?keyword=vendor+evaluation+matrix+template+excel', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'vendor evaluation matrix template excel', reinforcing the lure. The ML classifier also flagged this PDF with high confidence.

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.ru/pify?keyword=vendor+evaluation+matrix+template+excel
    • http://mepubewub.breenabuettner.com/uploads/1/3/1/8/131856584/lotofe.pdf
    • http://files.nicolejonesdevelopment.com/uploads/1/3/2/7/132740408/rakugodufosodajejiw.pdf
    • http://files.goldentreasureconsulting.co.uk/uploads/1/3/1/3/131383613/xuwadekatigivesafawa.pdf
    • http://files.mrstartroom.com/uploads/1/3/2/6/132680852/1931012.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/how_to_merge_docs_together.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/lagonokezolise.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/edit_online_free_sejda.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/18735348154.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/types_of_active_learning_methods.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/58737986526.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/a_an_the_zero_article_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/xusabuxuzop.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/active_passive_voice_exercises_all_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/jojur.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/54866913834.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006120.bin
e601d35db69bdaa6af973039c1f695a08c62f351cc7ac41828b2e7caf3c3b04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5132 bytes
font_01_sfnt_off00007288.bin
7460318bcc34dd0f67cc5f14ab08f809b5db94a1cc0901c83bf0aac065f9f2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 9768 bytes

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