Malicious PDF — malware analysis report

Static analysis result for SHA-256 c474d7c0d33c9264…

MALICIOUS

PDF

50.0 KB Created: 2020-08-15 06:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df342bc632eb33a29073547947baabdf SHA-1: acd54633a775cd06997afcb4ee8b664cb84e55b5 SHA-256: c474d7c0d33c92648989e015833c272baf660e99ae1d6111876f98f178f063bc
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'general knowledge' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic to distribute the 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=important+full+forms+for+general+knowledge In PDF document text
    • http://files.ingridpollard.com/uploads/1/3/1/4/131453847/4447949.pdfIn PDF document text
    • http://luxum.boardaciousboards.com/uploads/1/3/0/8/130814238/9988705.pdfIn PDF document text
    • http://files.fbctpa.com/uploads/1/3/1/8/131871583/texim.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/1/0430/4856/6938/files/leteresoxejux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/7878946977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/xabowudoxone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/96249750677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/57239968742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3276/2785/files/spatial_econometrics_methods_and_models.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/terimopixubenosuriloka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/1826230194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/60907536323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3980/5855/files/mafunumeladiwusijipu.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 1

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_off0000866d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866D 5452 bytes
SHA-256: ea87378382224a020f149da9dda7cb16401ebbbd6c941a8484155e8cfd17efdb
font_01_sfnt_off000098ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EA 10080 bytes
SHA-256: dcabd624a781d5a68c71fc54a149aa849fe789b54e146b0a63cf888baa84ac12

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