Malicious PDF — malware analysis report

Static analysis result for SHA-256 636c6be5cfbb1cd5…

MALICIOUS

PDF

43.5 KB Created: 2020-08-08 11:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86ba81ee48361763513662bb07ebf86d SHA-1: 7e5bc84b0164382297f33716ea7b0d9684cf669b SHA-256: 636c6be5cfbb1cd5461abef366704016c365620b9d217c39452dfd0d52dca32c
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.ru/pify?keyword=hero+system+bestiary+pdf, which is known to host malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness.

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=hero+system+bestiary+pdf In PDF document text
    • http://files.lbtdlaw.com/uploads/1/3/1/4/131453429/2861433.pdfIn PDF document text
    • http://volesarud.saintgeorgechurchok.org/uploads/1/3/0/9/130968917/pejaxaki.pdfIn PDF document text
    • http://files.jacobsearslibrary.org/uploads/1/3/1/4/131453588/xitofizawiz_juxefo.pdfIn PDF document text
    • http://files.blackbearantiques.co.uk/uploads/1/3/1/0/131069863/welumumud_julege.pdfIn PDF document text
    • http://files.platonicadventures.com/uploads/1/3/0/8/130874655/laxolo_mobiridixeb_raroperas.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/1/0432/1515/9458/files/mathematics_books_for_class_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3784/3871/files/varices_esofagicas_cirrosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/begoraladosunejezutemux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/sefepekekijunoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1110/3128/files/tecumseh_carb_adjust.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/vubuzuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8113/6296/files/php_clear_opcache.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/81968924208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/wulimufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/m_audio_fast_track_pro_drivers.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_off0000683b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 5356 bytes
SHA-256: ceab1e405fcd7d9f0be0e742c8bd836cf4c8a8c109227e64829c7d0f5004c3f3
font_01_sfnt_off00007a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 10948 bytes
SHA-256: 3dc40eb2afbad388098e60d591fc496debf163687e723d2e2edc008fe81b2068

Open this report in the interactive analyzer, or submit your own file for analysis.