Malicious PDF — malware analysis report

Static analysis result for SHA-256 646e389f5ed4296b…

MALICIOUS

PDF

51.2 KB Created: 2020-08-11 16:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de7fe95e10400861de9a58279618c9e5 SHA-1: 0968e345b624b5a664d91d25475c7559366fb31a SHA-256: 646e389f5ed4296b6d5ca6619f34eec397db151b23ddd773832abf1ed2d84810
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body and heuristics indicate a link farm strategy, likely to obscure the final malicious destination and potentially for SEO manipulation to lure victims. The ML classifier strongly supports the malicious verdict.

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=eulerian+numbers+petersen+pdf In PDF document text
    • http://mewibep.lifelybali.com/uploads/1/3/0/7/130738836/rokatedaratari-butimodagig-gokabul-guwizoluw.pdfIn PDF document text
    • http://files.mpacf.shop/uploads/1/3/0/9/130969754/wefovedopad_sixunil.pdfIn PDF document text
    • http://files.centrosapienti.com/uploads/1/3/1/6/131606202/xuzilevipomo.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/1/0429/7015/3113/files/12033395307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/janodav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/jirejabexijereg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/mazatuwaser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/30712653373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/bitefasodewono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/precalculus_textbook_demana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/changing_to_word_document_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/fish_farming_books_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6292/7253/files/commandant_s_reading_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/94383171348.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B66 5284 bytes
SHA-256: b2e3edff732a24e8e91a642ff94e870d8093bcce3136958bd4c74ef6e6264736
font_01_sfnt_off00007d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 13976 bytes
SHA-256: 8cc2dd70f35d2b092fcf4be62805dbeff1df2f128664e87d7304e52dd0f5cdd0
font_02_sfnt_off0000aa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA27 16276 bytes
SHA-256: 1f5b0b48d011de472dc2181564d90ad522325fe034994414c55550010d0925d3

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