Malicious PDF — malware analysis report

Static analysis result for SHA-256 80869105447ffd03…

MALICIOUS

PDF

37.7 KB Created: 2020-07-29 07:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03b4efb2381b7e21680eff849f00657a SHA-1: 6a7fbeb18b3520274f5d2a08ac9ad9cb35d80125 SHA-256: 80869105447ffd0338740940710c76aa3fd1ae7744c3ffc1f9483468c893406a
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious SEO link farm, specifically `https://ttraff.ru/pify?keyword=advanced+mathematics+precalculus+textbook+answers`. This URL is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for 'Advanced mathematics precalculus textbook answers', aiming to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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=advanced+mathematics+precalculus+textbook+answers In PDF document text
    • http://files.ox-fest.org/uploads/1/3/1/4/131406275/9671805.pdfIn PDF document text
    • http://files.debbieleejewellerydesigns.com/uploads/1/3/0/7/130739652/8abb37085.pdfIn PDF document text
    • http://files.hardemanschool.com/uploads/1/3/0/7/130775528/toborofajipoji_nupigovi_dakaxo_mowekeruse.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/1/0430/1763/3949/files/10534550347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/84622089662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/mavak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/ligepog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/guvut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/fasinadebutefogojanoxawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/taxalatovefesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/mipuluvivafebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/60263788448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/24726832002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/81158480140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/xewikefisimob.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 5

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_off000053ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53CE 5608 bytes
SHA-256: 4d215fd062c472ca46d020adcbb56732658e2a7fc578ae4e3c2d4084fcd0c3d3
font_01_sfnt_off000066b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 9864 bytes
SHA-256: 99539a473f12fe20837d77d06e0f6a753ed9ebcc89212639b9b3480e2d45ee79

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