Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4dba1e078233713…

MALICIOUS

PDF

49.3 KB Created: 2020-08-25 16:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3cf0f9ddbd4acca3e6eaa0cedd6d495f SHA-1: 2218b40cbda8c9415263fd6e8b6f78dabfe02894 SHA-256: f4dba1e078233713cdf159195a3f3ef80fc391ad646db886f1c942a53451620b
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs, likely as part of an SEO manipulation scheme. One prominent link, disguised as a driver download for 'Behringer u-phoria umc204hd', redirects through a malicious infrastructure at 'ttraff.ru'. This suggests a phishing or malware distribution attempt, leveraging SEO tactics to attract victims.

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=behringer+u-+phoria+umc204hd+driver+free In PDF document text
    • http://files.lansingweddingdjs.com/uploads/1/3/2/6/132696598/4fa6dfad8.pdfIn PDF document text
    • http://files.yauno.nl/uploads/1/3/1/8/131858540/xedaje_pemabejarilu_fimakatafomej.pdfIn PDF document text
    • http://files.thealtgrp.co.uk/uploads/1/3/1/3/131384249/najako.pdfIn PDF document text
    • http://bikiteb.twinsrun.com/uploads/1/3/1/4/131453645/lokoj.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/1/0428/1283/3959/files/facebook_ads_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/knee_arthroscopy_rehab_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/dmu_match_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/genetic_code_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/96114454732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/personal_cv_powerpoint_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/ximep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5954/3969/files/swot_analysis_report_conclusion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/advantages_of_social_media_for_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/83918408745.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 2

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_off000080db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 5864 bytes
SHA-256: 377b2463248c1f5e9edae1319eb09c6deed1abf3f9f3d7d346cd349125dfc6c8
font_01_sfnt_off000094b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B6 10480 bytes
SHA-256: 382d61c5040a9617d9dc3fcff622c050b42191c5ec725f99d121c82e7d8c406b

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