Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c3ecd5384c90c3…

MALICIOUS

PDF

46.7 KB Created: 2020-08-25 03:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31f88bc7654b5efa829e6ae97ae56f27 SHA-1: 9b83bbf6dcfda8fdad9fbebbe9ccc4cca3108966 SHA-256: b9c3ecd5384c90c30a8764ce71f346f70410f1f289b591888c7f5346504c5be9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or redirection scheme. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious objective. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, indicating a lure. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=cheque+em+branco+filme+completo+dublado In PDF document text
    • http://files.workingathomenews.com/uploads/1/3/1/4/131407958/5674186.pdfIn PDF document text
    • http://files.bakingmemorieswithpam.com/uploads/1/3/1/4/131437815/gijususefiwijatit.pdfIn PDF document text
    • http://netowujiv.intaglioso.com/uploads/1/3/1/0/131069759/lijifubotep_tosaf.pdfIn PDF document text
    • http://vozetad.jdudleysmith-acupuncture.com/uploads/1/3/0/7/130776699/7093a7f4344e.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/1/0439/8468/3166/files/html_to_angular_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/derumorasekepilufutepovut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/virudibel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1954/3199/files/71855592467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/creative_beamforming_microphone_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/tinanujulad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3703/5429/files/polymerization_process_modeling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/29452586007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/37929254561.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 3

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_off00007573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7573 5388 bytes
SHA-256: b3c7e36aef4c36040f0767d27fbd2537243ddf9deaf958bd0f823dd4c5eb7a41
font_01_sfnt_off00008792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8792 12124 bytes
SHA-256: 42dd24564eb26089a9d398fa249612a82d39a421ae555823b0e84e1788d61cad

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