Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d4da44b5b976f7…

MALICIOUS

PDF

53.5 KB Created: 2020-10-16 18:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 56a70e5d19864e3fa050f724d9886f4f SHA-1: ad9f9616623f47c36d9ffaa0cf2faf03dbc79d9f SHA-256: c5d4da44b5b976f7add21bc67390945645f0ec8e4b1567b0c4a57b1febdf8402
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wb?keyword=download%20salvation%20hentai%20game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f87f5e22d900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f890feabe2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f89923e737d1.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/giwoxufoto.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/9232815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f88a66fcb613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f872513b03c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f87aeb37ac85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f893f526a837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f899dc364087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8264/0285/files/61412784210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/caracteristicas_de_violencia_en_el_noviazgo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1602/6815/files/zizezeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62afa1e2-fe67-4cc4-9e0d-a1eef9232356/godugagoxazaxuxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb0464b-1cc4-48e7-b0da-8d673fb611b7/zokumagegejav.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7850 3580 bytes
SHA-256: a87c33f9bab202a733af54eb65f5b6fb127f4e7b33646642599895c09fb6df1b
font_01_sfnt_off00008525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8525 5080 bytes
SHA-256: 1dc5745686d7f921bc50ac3409849d75fec484ec9741f1fe8ee6e655624ce21e
font_02_sfnt_off0000965d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965D 10420 bytes
SHA-256: a57e8d1f6ebfb6c25dd0cdc67ee660d8cf248f4c52124364ef6a7f68b1ecfc92
font_03_sfnt_off0000ba1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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