Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a809f65019fe09…

MALICIOUS

PDF

39.3 KB Created: 2020-08-10 13:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5299d7be6da04396aed5ff4790051331 SHA-1: 44f0f90db4501baf7e7fe4e426793ad5c263c246 SHA-256: 82a809f65019fe096dd7c5b8baa44cdc6a81adfb46cb61d54083f747ada48315
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) disguised as a free download for a medical textbook. This indicates a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that the document is designed to lead users to malicious infrastructure.

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.cc/pify?keyword=clinical+examination+book+for+medical+students+pdf In PDF document text
    • http://files.quantumfoundations.org/uploads/1/3/1/4/131406800/fokusegejomub.pdfIn PDF document text
    • http://files.3riversmuseum.com/uploads/1/3/0/7/130740213/0e663.pdfIn PDF document text
    • http://files.marissagable.com/uploads/1/3/1/4/131453054/kadexijerob-futumodirokak-sazevatuxebe-bibojuduxufod.pdfIn PDF document text
    • http://files.villaamizade.com/uploads/1/3/0/9/130969293/moxerifetinipowuwig.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/1/0428/9835/8432/files/57032902602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/favikotarogepuvef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/jimuwizasaguxikatosuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/kewizaxeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/bonob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/tasologobaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/xedejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/vabakefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/xatologo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/boxonumilanunowumoxunetaj.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_off00005aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA9 5476 bytes
SHA-256: ea4923f5bd918ce0803cbc05a8a93b1614625cff30dda588a74337ec74e69104
font_01_sfnt_off00006d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2A 10284 bytes
SHA-256: 2e8877b3a36e8fbc171ffbfde10e095902e484e5dfa4fd488ed34a318d039c16

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