Malicious PDF — malware analysis report

Static analysis result for SHA-256 287fc9db3095590e…

MALICIOUS

PDF

36.0 KB Created: 2020-08-21 01:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bc3eb48afcf94942408e86b6e1a5885 SHA-1: 2f604272bc9a1be9ee2ad24717969042fd541bd7 SHA-256: 287fc9db3095590eba1c2735cefe0242ea11eeb2762a80251d6ec58bfea3f7a1
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=traumatic+cataract+pdf', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector and the link farm heuristic are sufficient indicators of malicious intent.

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=traumatic+cataract+pdf In PDF document text
    • http://files.spamitzvah.com/uploads/1/3/1/3/131384789/2268709.pdfIn PDF document text
    • http://files.duanebrownlaw.com/uploads/1/3/1/4/131483253/2887604.pdfIn PDF document text
    • http://files.stefanodenicolai.net/uploads/1/3/2/7/132712514/c741f.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/1/0432/5765/9560/files/no_plot_no_problem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/gobibisowewugodijitarize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5213/7625/files/char_broil_big_easy_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/70963531186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7033/8725/files/62467060196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/89642098181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5611/4337/files/sovivura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/a400m_crash_investigation_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1252/9055/files/devazovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/breaking_free_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7618/1404/files/internet_of_things_ppt_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/difubagogejodebulov.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_off0000505c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505C 5040 bytes
SHA-256: b527f8ef1181b4140b456f9640b578dfb2c76d68852a9f98802ea3d1b68d2095
font_01_sfnt_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 10024 bytes
SHA-256: 86b97a5a2ca12a94328d1aa06e3882aac1bccd7e19d44383ec68d1ad01ed96b1

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