Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f2467e36149d79…

MALICIOUS

PDF

49.6 KB Created: 2020-08-12 09:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5e811c4e2792538542fca1212dfd07a SHA-1: c0da932bc7e23d79bad5fd5027ee26eec0a1bae4 SHA-256: 39f2467e36149d79c621bf29899335c850ff5bfeae529ccfbcab08595d75f876
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded artifacts reveal a large number of external links, with one specifically identified as a malicious redirector: https://ttraff.ru/pify?keyword=cerfa+2020+rici+pdf. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to distribute 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=cerfa+2020+rici+pdf In PDF document text
    • http://files.buckdeanery.org/uploads/1/3/1/6/131637257/busoza.pdfIn PDF document text
    • http://files.ajhealthylifestyles.com/uploads/1/3/0/7/130775137/nupen_titadokonetef.pdfIn PDF document text
    • http://files.sunnysidesymphony.org/uploads/1/3/0/8/130814666/kisigegis.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/1/0431/1026/9085/files/atomic_theory_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/bedezuzoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/64298184512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/33253524133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/watch_princess_bride_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/77430282542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/fodugipomepeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/2004_ford_expedition_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/44660324059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/jegaganudubajalevesavamam.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 6

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_off00007f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F90 5116 bytes
SHA-256: 580e0c81c2294fb27b96d6c52aa62f62828d1078c52a7a2aeb811ee6f8bd9a3d
font_01_sfnt_off00009103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9103 12660 bytes
SHA-256: de0837f67ce804d4b58673bbe4b29de7395f0deefefca9282b439b8d57def867

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