Malicious PDF — malware analysis report

Static analysis result for SHA-256 e810d2160174d604…

MALICIOUS

PDF

34.3 KB Created: 2020-08-16 18:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4fa32b8f76045add476e30882191388 SHA-1: a64310bc6a175c70e548e0fc0b11f338f23e555b SHA-256: e810d2160174d604f2fecc7d0976b4f951ada77b79f15dba41aa38aa45ead511
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', are likely part of a phishing or malware distribution scheme. No scripts were extracted, but the structure suggests a lure document designed to redirect users to malicious content.

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=non+chronological+reports+year+3+animals In PDF document text
    • http://xugewev.mfautodetail.com/uploads/1/3/1/8/131872225/gonibufu-tetugop-vapigubebawaxal.pdfIn PDF document text
    • http://files.abqcraftshows.com/uploads/1/3/1/8/131856160/poxafes.pdfIn PDF document text
    • http://pezugudu.frenchstandardpoodles.com/uploads/1/3/1/1/131164250/kutixivawotipezevo.pdfIn PDF document text
    • http://sekaf.en.philippeweppernig.com/uploads/1/3/1/4/131452883/363e1d.pdfIn PDF document text
    • http://files.craftofscientificwriting.com/uploads/1/3/1/0/131070751/lotetob.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/1/0437/9571/0113/files/towogozanisigupuwutazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8157/8136/files/nakabexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/aerosinusitis_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/warefikesotoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/phytochemical_screening_and_antioxidant_activity_of_medicinal_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/angina_de_pecho_tratamiento_fisioterapeutico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3425/2188/files/ielts_speaking_part_2_and_3_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/66771299578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/81607283184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.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 4

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_off00004890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4890 5580 bytes
SHA-256: d8df36cc9a931d5ca1b525369ccfd5b5e41b8193702b6a67dad2c94cc71a5e44
font_01_sfnt_off00005b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B60 9628 bytes
SHA-256: 39a71f22525d31cda191252a8eed0a00acc8b8a43031bf9551f5ea78fc62eca8

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