Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca27c83349914cb…

MALICIOUS

PDF

37.9 KB Created: 2020-08-10 01:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: faac334e26a9610e72506183f1a1e62a SHA-1: 24c4cc1a5d40d6de09271c8f8e9c5f6851c98e91 SHA-256: 5ca27c83349914cb88afcbca6f67fe81df1b985b8a0c01ba603501ac9cc365d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself appears to be a lure, possibly for SEO manipulation or phishing, by linking to numerous other PDF files. The primary redirector URL is https://ttraff.ru/pify?keyword=atkins+fisico+quimica+9+edi%25C3%25A7%25C3%25A3o+pdf, which is a strong indicator of malicious intent.

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=atkins+fisico+quimica+9+edi%25C3%25A7%25C3%25A3o+pdf In PDF document text
    • http://files.marengotzmann.net/uploads/1/3/0/8/130814052/3426578.pdfIn PDF document text
    • http://files.saintgeorgeontario.org/uploads/1/3/1/4/131438098/vuworuzevuxo.pdfIn PDF document text
    • http://files.wolfstarhealingservices.com/uploads/1/3/1/3/131384281/8909658.pdfIn PDF document text
    • http://lerose.silvastudioart.com/uploads/1/3/1/4/131437792/wovexipag.pdfIn PDF document text
    • http://files.georgiahistoryteacher.org/uploads/1/3/1/6/131606393/jasobezomixomawe.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/1/0431/7852/4832/files/third_conditional_inversion_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8855/7718/files/sample_swot_analysis_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/93202259791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/luninuwewegetag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/47032057763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/88021635479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/6719994209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/technical_drawing_with_engineering_graphics_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/diablo_2_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/denofosetewosebapemaju.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 8

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_off00004df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF7 6008 bytes
SHA-256: 0426c76e63a5b01cd19014151a599fda216aa9d21ef299ee9c34ab711033cc41
font_01_sfnt_off00006193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 12724 bytes
SHA-256: 620068c45bd7a12798fa481095f89f85010f30361127c2343afaa63060e3c2f5

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