Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa6b5fb7c4b6ba2…

MALICIOUS

PDF

33.1 KB Created: 2020-08-19 22:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb89bdf0cfef9b8816fc1815993fbe21 SHA-1: 412c4a534e3768469acdafe5ac9d60d45136ce89 SHA-256: caa6b5fb7c4b6ba2cda23da4ee8f98fd71cc68204e0aca28c391aab156c44939
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link points to a redirector, suggesting an attempt to lead users to harmful content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and link farm nature point towards a content-distribution or SEO-manipulation scheme.

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=synonyms+information+gathering In PDF document text
    • http://files.jameswilmot.com/uploads/1/3/1/4/131438453/boxede.pdfIn PDF document text
    • http://mimejesud.francelessart.com/uploads/1/3/0/8/130873826/tavenijuledutetomuz.pdfIn PDF document text
    • http://files.cisdfoundation.org/uploads/1/3/0/8/130813859/cc6641d4.pdfIn PDF document text
    • http://files.bluemantaswimming.com/uploads/1/3/1/4/131454549/094a5b265.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/1/0433/4885/2894/files/hornady_reloading_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/google_sheets_merge_cells.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/imagina_super_site.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/printable_tracing_worksheets_for_2_year_olds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/average_speed_america.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4169/7441/files/basso_ostinato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/9657784367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/19339811649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/50388703254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9336/8725/files/88910860626.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_off00004576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4576 5356 bytes
SHA-256: f8803d2257d2e5e5154aa04bd0d4d4426b72be7b0fffb24550a54c68ea5b2561
font_01_sfnt_off00005777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5777 9524 bytes
SHA-256: 0754e019a6d1ec26ff7b98ce4dbb8a3020df1ead557d80784e76bf2f8fe7a53d

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