Malicious PDF — malware analysis report

Static analysis result for SHA-256 827f97f2b16fe87a…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 16:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b74f875e06b24c10fed8772107e1b2f SHA-1: e0b0a5e23031ca090c5fd42fac475f5e308ed95f SHA-256: 827f97f2b16fe87ae78457e1a9978ed9f8ddf5fbf9e89ce41e7e9c7bffbf40f7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body and heuristics suggest a link farm or SEO scam designed to trick users into downloading files, ultimately leading them to a malicious redirector. The ML classifier also strongly indicated maliciousness.

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=pesquisa+qualitativa+livro+em+pdf In PDF document text
    • http://files.bamabreddoodles.net/uploads/1/3/0/8/130874691/pagojovigarurem.pdfIn PDF document text
    • http://files.petesrockymountainpizza.com/uploads/1/3/0/7/130775025/vafemilenojilepu.pdfIn PDF document text
    • http://vemikemi.uuyacj.org/uploads/1/3/2/6/132695384/pefuzel.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/1/0438/3342/6082/files/water_in_landscape_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/34002221891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/mureveketobasavipexalopew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/cellule_nerveuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/punctuation_worksheets_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/pezujogutumopewafiwogodor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/5259895136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/budismo_dionisiaco_claudio_naranjo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/2367252871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/80509923139.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 3

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_off00004604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4604 5376 bytes
SHA-256: 73fb32939339f7c6a92364cb2cda851242e995a474bdfae8a5bb2851e1afd7ec
font_01_sfnt_off00005839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 11892 bytes
SHA-256: 6ba308cfebdc9aeb85f055fe997943125ef1d3ed3c46a865fc2f1d888f7117c2

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