Malicious PDF — malware analysis report

Static analysis result for SHA-256 a451b6b33f3433cf…

MALICIOUS

PDF

40.3 KB Created: 2020-08-03 21:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8678e13db07b285132dbbde541d9eb47 SHA-1: 9de0f8f8923a0cbe0c91780db13a5a2b0f6c703f SHA-256: a451b6b33f3433cfb81d7afeba3c3140defd1421aa85f11c50bf2d80b85e8de7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a book title and the authoring application, suggesting a lure to disguise the malicious links. The primary malicious URL is https://ttraff.com/pify?keyword=livro+o+cristianismo+puro+e+simples+pdf, which likely serves as a gateway to further malicious content.

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.com/pify?keyword=livro+o+cristianismo+puro+e+simples+pdf In PDF document text
    • http://files.kingboosvideogames.com/uploads/1/3/0/9/130969588/rofonopugutilitadugi.pdfIn PDF document text
    • http://files.derekroddysblackheadedpythons.com/uploads/1/3/2/3/132302907/d4daa63aca3b46.pdfIn PDF document text
    • http://files.4lifeinc.org/uploads/1/3/0/7/130738940/pelorutetivuxe.pdfIn PDF document text
    • http://files.mitchellmillermusic.com/uploads/1/3/1/4/131437491/3897494.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/1/0433/0687/7080/files/92835403356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/zameniwijegixiwedubepuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/ketemem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/fominivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/81103816759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/wuwonakug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/5882557505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/81691951845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/23292975253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/pupalofakodezametokiruka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/jarixupudanenokevinil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/18518828288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/84623860510.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 7

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_off00005a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 5304 bytes
SHA-256: 873db6b32271c0e13c5ca39983c87a64b90a5a67db00c27a4e217fe75f9b687f
font_01_sfnt_off00006c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 12736 bytes
SHA-256: 81dd9f099f1bc3883b0a58106e8b6a906154b81f25b6a37559d7d00a2fd861f5

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