Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d691218f8b699e…

MALICIOUS

PDF

39.4 KB Created: 2020-10-02 07:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 95917a6f1b8a6ce79a4f7ea26abfcd52 SHA-1: 24fbe639e9daa05b10d3ed427e0a5b9a3b832530 SHA-256: c5d691218f8b699e3649b99b665621f0c7f7b9572be455ae6f851d7513fd16e7
194 Risk Score

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://cctraff.ru/strik?keyword=palabras+de+presentacion+para+una+quincea%25C3%25B1era In PDF document text
    • http://xawiw.freedfamilyfarm.com/uploads/1/3/0/9/130969204/toxijeb.pdfIn PDF document text
    • http://files.denverindustrialski.com/uploads/1/3/1/1/131164236/1335bfbe.pdfIn PDF document text
    • http://rilusa.aahsanguilla.com/uploads/1/3/1/4/131407592/8354997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b060789-e8c1-4af4-bc06-b56afe6b50ae/53171432299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537f0d90-7c01-4532-973a-a2a0ed4c8634/fewebedisisozovirufumub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f225e5-49ea-4a36-bbcf-88ed3221d4e0/gumudaberapomefuxupitoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/gizupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3280/8088/files/ncis_theme_song_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5136/3735/files/bikokisajekixif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0866/6011/files/forrest_gump_streaming_indo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7425/5769/files/3695239873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/mavirorobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/13771265823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7093/7495/files/albany_local_search_engine_optimization_mean.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AB 5548 bytes
SHA-256: f719503a674be04e6d09284a7768a562b6f68dd3bf8d3e12feb27e2f1e424775
font_01_sfnt_off00006b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3F 10888 bytes
SHA-256: ff8c5475f4f37e45f046023f1900ca81226eb82368ae7386a488505d0f90e20c

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