Malicious PDF — malware analysis report

Static analysis result for SHA-256 8464497ba1d9529e…

MALICIOUS

PDF

43.1 KB Created: 2020-10-26 11:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f76bf910a5b7d37836261ec7a090cae7 SHA-1: f81907a7719bbd86561ea245bc2211849fee9462 SHA-256: 8464497ba1d9529e62a4545dcc9aa856b2959f1ed48b83fdf0a767473db2e36d
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/123?keyword=graphic+design+free+download+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f95e3002e966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f946bac7086f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f89045f769d2.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/3abfff1217f32a6.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/jibag-divojesoxituman-bamage-sunisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f9519fac37b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8d42d6810b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f8ca555aa861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f890301b038f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000068ef.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000068ef.bin)
    • https://cdn.shopify.com/s/files/1/0491/8296/5926/files/daxemumibetijojikanare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2817/0910/files/1972462758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/23175779201.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/actuarial_science_exam_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/45963101995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3570/4482/files/livro_o_milagre_das_rosas_em.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0305/8623/files/chess_moves_book.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 extracted file (font_00_sfnt_off000068ef.bin)

Related samples 4

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_off000068ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5540 bytes
SHA-256: 5af4a4f931d2b59f10471e2d666d5dbcc648b1d9e838a7c8e1863978a9a1f196
font_01_sfnt_off00007bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDB 10524 bytes
SHA-256: 9357d6aa4603f00f8f28aef670d7a4b9ae9f710dd6b34dc90343ef70ab85194e

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