Malicious PDF — malware analysis report

Static analysis result for SHA-256 098835f7d107908b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-01 13:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd705f38c65dbc5ab689f11ecea05b0a SHA-1: 2415e94aa207f0030a1633d12c722b1cf342b059 SHA-256: 098835f7d107908b4d07ffc3cccc125558aef89b5872f133748722f5f4144dbf
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

The PDF contains numerous links, many pointing to SEO-optimized PDF files, a tactic often used to disguise malicious content. A critical heuristic identified links to a known malicious redirector, 'ttraff.ru', which is associated with 'ant downloader chrome'. The document body also contains a lure for browser extension installation, a common social engineering technique to trick users into executing malicious code or providing credentials. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=ant+downloader+chrome In PDF document text
    • http://files.godswaytshirts.com/uploads/1/3/2/3/132302815/7c24d7928c8eda5.pdfIn PDF document text
    • http://files.carolgarbodenmurray.com/uploads/1/3/1/3/131398019/d1265c15a7cce3c.pdfIn PDF document text
    • http://files.thepaullindereducationalfoundation.org/uploads/1/3/0/9/130969981/nuwejununu.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/1/0433/2060/6885/files/lexidumifinufewisosexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipipopiluniwewikojidil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/69052868208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/xadubajidupodil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/2004_yamaha_v_star_650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/mitewadesamadeguzofuvojol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/sunopevepimovinuwilirav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/pefiwowidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/17437541664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9024/files/ps_form_3575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/20260772638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/fojetipuvaxudifaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.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_off0000670a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 5084 bytes
SHA-256: ef7bcaabc2fee31611db7f5ab22f22519d0983bbf23fdfc7b02cc50ee738b1ff
font_01_sfnt_off00007839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 10724 bytes
SHA-256: 88a8a1bb04e93c80e53b4c789855f99504d694c349b0afd11c45f89cb601d644

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