Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c858c341c72f8d5…

MALICIOUS

PDF

44.1 KB Created: 2020-07-31 10:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3cd7f7e49e5fff76f2aedaf287baa303 SHA-1: 5241f796d1114d7124e6cc181a5172eb59cc9a13 SHA-256: 0c858c341c72f8d5415c4c39ab11b3ce4e55fecc5f8da78bff8987b2e9aea98d
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified as a redirector at 'ttraff.ru'. This is further supported by heuristics indicating a malicious redirector link and an SEO link farm, suggesting a phishing or scam attempt disguised as a free download. The document body, though heavily obfuscated, contains text related to business English and the authoring application, reinforcing the lure.

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=apprendre+l+anglais+des+affaires+pdf In PDF document text
    • http://files.treeoflifetroupe.org/uploads/1/3/1/6/131637723/donirimiwiti.pdfIn PDF document text
    • http://files.swanspirit-perthwa.com/uploads/1/3/1/6/131636775/mewunigigu-nanuk-bolow-tizotutumomo.pdfIn PDF document text
    • http://files.capecodmedium.com/uploads/1/3/1/3/131397940/nosurelixagiwulezagi.pdfIn PDF document text
    • http://files.hongaku.net/uploads/1/3/1/8/131857305/38894953d6e.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/xuvekalododit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/pirud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/fasulivovapamorojafuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/24910696956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/mobaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/juzexole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/mekalaredi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/32423925740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/gasonamudi.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_off00006dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 4796 bytes
SHA-256: f9b4fdae16a394a1780743f65b6db152da6756a98a32c6cdd7c200dc24f53565
font_01_sfnt_off00007e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E20 11148 bytes
SHA-256: 2e3c188f712b3184350b8f1726af00e153b80907ff527589087fde8a39be20b1

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