Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a40e62ce831e147…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 23:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 098c94d07b2475126324899daba9a79f SHA-1: c9e9a7220e1e10da0a202ba296a2025c2fc928ab SHA-256: 9a40e62ce831e147801c798d5db64737f5bc3e591fc8de0b5329e16a6eadba6d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a redirector link to 'ttraff.cc', which is known malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body is heavily obfuscated, but the primary attack pattern appears to be directing users to external, potentially harmful, 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.cc/pify?keyword=lord+of+war+movie In PDF document text
    • http://files.nekimastrategies.com/uploads/1/3/0/7/130775001/musekogumod-xewuxarejaf-jupeku.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/1/0440/8924/5861/files/advanced_vocabulary_in_context_with_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/57699448013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/a._n._m_course_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/cascada_de_coagulacion_actualizada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/wetajigewugixob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3005/9940/files/18454685144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/bakoxofolab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/los_misterios_del_santo_rosario_catolico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9173/9043/files/gaxevudijafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8188/4067/files/trial_balance_sheet_meaning_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6395/7909/files/ispad_diabetes_guidelines_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/sivupus.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_off00006e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 4936 bytes
SHA-256: b4cb6340386b68c82f98b703b5753021c29b08521e7f3d71d21b171844730b03
font_01_sfnt_off00007f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 10404 bytes
SHA-256: f76d0a6f90457abf024dce8c5d1d3d92e6b1a710339022be2e0ea418a14f534d

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