Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21ef7b51c989729…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 22:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a9bdf00efef4c043f1496459c478a93 SHA-1: c847d4235d682902e3f5e40f18294b92988e5ae3 SHA-256: e21ef7b51c98972968ee6a11fb282ebcd369d801a893293550f1b93af4e2bb53
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.ru/wix?keyword=ikea+in+china+case+study+pdf', is identified as a known malicious redirector. The document body is heavily obfuscated and contains remnants of the URL, suggesting it was used as a lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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/wix?keyword=ikea+in+china+case+study+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f17a7107139c4720a0155e6e97f25fed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fa6f14_36819f8329934cab8fa14e1e2cff10e6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e79a6_1d4917d7e0b54c81b594b737616c17ba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/469aea_4b78f6655d9c463c9b1548efed4cd5ac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05900a_e8abbab5304940c9b6b77522cdd3d1f9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6756/3420/files/16887615554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/65009420921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/wajazolelobem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/fajanilanezuka.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 1

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_off00005d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D97 5216 bytes
SHA-256: e98ea8aa88cef225dc5662a490277add10294dcd7b285f16e925c08c9f7c58f3
font_01_sfnt_off00006f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F65 9648 bytes
SHA-256: 19de2992c311afc2ece19637fd239f934028e8e3ef3bba67e8376b3ebefd89ec

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