Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bc76d3f942d9cf…

MALICIOUS

PDF

43.5 KB Created: 2020-08-13 22:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82bacf8ff8c75416394ef4c64c91a9e7 SHA-1: fe7822e699b9dea933bfc75d4dd7711563c77896 SHA-256: c0bc76d3f942d9cf2afc8b7898a42e666ef57f6a68de1767a8a19bf858bafd53
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented to the user with a lure for 'Torch browser windows 7 free'. The PDF also contains a link farm heuristic, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to improve search engine ranking for malicious lures. The primary malicious URL is the redirector.

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=torch+browser+windows+7+free In PDF document text
    • http://zokulado.dwayneblackaller.com/uploads/1/3/1/3/131384284/nafojunebovak-jepovedanav-pugagidupunaf.pdfIn PDF document text
    • http://files.david-reinhard.com/uploads/1/3/1/4/131438639/vavorawesixeku.pdfIn PDF document text
    • http://niroxo.adultgleeclubaustralia.com/uploads/1/3/2/8/132814930/rudadelam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/megugevaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7665/7057/files/zotasodunijubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/english_textbook_8th_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/35843598428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/fap_titans_reborn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0709/0598/files/84012629545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/90909785334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5570/9351/files/naruto_season_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/rivibuvaleroru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/lipigis.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
🗂 Part of campaign: david-reinhard.com 3 samples

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 4836 bytes
SHA-256: d288d1a09af5e3466874aeedff8fee6b877af963a678c09e27de81fc19121bfd
font_01_sfnt_off000070f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F7 10020 bytes
SHA-256: 2f3a130501c7db81d77927c591c7a9bb0166827e3b3fa9eb53f79c2e682ae8a7
font_02_sfnt_off00009353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9353 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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