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) First seen: 2026-05-09
MD5: 9cf6c72ef4ff3d58a69ba26e8538a21d SHA-1: c8e01440ce9e1d90b208b7cf8b96b6bb44c21750 SHA-256: 8f4c1d06d8681810fd63c5365db095f1a3233a19ff1413362f67132712391d0f
194 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=vendor+evaluation+matrix+template+excel In PDF document text
    • http://mepubewub.breenabuettner.com/uploads/1/3/1/8/131856584/lotofe.pdfIn PDF document text
    • http://files.nicolejonesdevelopment.com/uploads/1/3/2/7/132740408/rakugodufosodajejiw.pdfIn PDF document text
    • http://files.goldentreasureconsulting.co.uk/uploads/1/3/1/3/131383613/xuwadekatigivesafawa.pdfIn PDF document text
    • http://files.mrstartroom.com/uploads/1/3/2/6/132680852/1931012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/how_to_merge_docs_together.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/lagonokezolise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/edit_online_free_sejda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/18735348154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/types_of_active_learning_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/58737986526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/a_an_the_zero_article_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/xusabuxuzop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/active_passive_voice_exercises_all_tenses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/jojur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/54866913834.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5132 bytes
SHA-256: e601d35db69bdaa6af973039c1f695a08c62f351cc7ac41828b2e7caf3c3b04f
font_01_sfnt_off00007288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 9768 bytes
SHA-256: 7460318bcc34dd0f67cc5f14ab08f809b5db94a1cc0901c83bf0aac065f9f2d2

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