Malicious PDF — malware analysis report

Static analysis result for SHA-256 78965b8c05073cb1…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 03:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c7a548ce4aafce328d38b73914830d7 SHA-1: 17ff44aba89342e3da6680c0b005dfbb8485fead SHA-256: 78965b8c05073cb1927148067211fdd4ff0f7640f03db794b36734c8b9e48284
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which are embedded within a link farm designed to appear as a free keto cookbook. These links redirect to malicious infrastructure, specifically the URL https://ttraff.ru/wb?keyword=free%20keto%20cookbook%20pdf, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=free%20keto%20cookbook%20pdf In PDF document text
    • http://files.wakefieldmiddleschoolpta.org/uploads/1/3/0/9/130969206/simalitixirixovogona.pdfIn PDF document text
    • http://files.datumfoundation.org.uk/uploads/1/3/1/4/131454304/968664.pdfIn PDF document text
    • http://files.steelcityselfdefense.com/uploads/1/3/0/9/130969301/769263.pdfIn PDF document text
    • http://subixul.poboyswheelsource.com/uploads/1/3/0/7/130739553/mafuzu-tiduwudivefuw.pdfIn PDF document text
    • http://files.catrinastiller.com/uploads/1/3/1/8/131856519/6f2857ca6e.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/1/0436/5503/7093/files/45188180817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/39074744561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1613/1484/files/carprofeno_en_perros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/nolojuwamuxaxedudusisim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/75780854643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25781613666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/what_is_a_smart_action_plan_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/vasogozuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/assistive_listening_devices.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_off0000654a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654A 4888 bytes
SHA-256: a512720a4b4b2777a3bb8b767cefe89423cd1f3b5b23cedb15167d0f4ec95529
font_01_sfnt_off00007603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7603 10908 bytes
SHA-256: 7aab0c369be28562e26a5dc2386fcf7af6bafd04a92f2a8f09dc52936dfb9094

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