Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f78afe2e755cd74…

MALICIOUS

PDF

57.2 KB Created: 2020-08-28 01:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 648c118a1cce43e2043f7a14078b27d0 SHA-1: 6b4e161c15cf2bb4d0eb197855c4618c0333a2a3 SHA-256: 4f78afe2e755cd74aa46bb5d417426ab647cebd3548668db4ef4f73e795c8cd1
194 Risk Score

Malware Insights

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

The PDF file was identified as a malicious redirector and a link farm. It contains numerous embedded links, with the primary malicious URL being 'https://ttraff.ru/pify?keyword=novel+outline+format'. This suggests the document's purpose is to lure users to external, potentially harmful websites. The presence of a link farm indicates a broad distribution strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=novel+outline+format In PDF document text
    • http://files.antiquestauranga.co.nz/uploads/1/3/1/0/131070146/93e045.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/1/0429/7133/2767/files/zixikiboraxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/college_physics_knight_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/muwubeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/mercedes_a_class_2018_manual_gearbox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/xuzadaxelojuves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/kolupasulegirodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/budget_highlights_in_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9194/6661/files/mordhau_player_count.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 4764 bytes
SHA-256: ab6b36ed06749c8653c5e1559076cecbd0d9bae84f914b54ccafb0cb66904d93
font_01_sfnt_off00007f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0B 11432 bytes
SHA-256: 4a1808e3cac35b26ee32a3261f27b4092d6d3904cb11232ed68f3add11ddf54c
font_02_sfnt_off0000a1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C5 9508 bytes
SHA-256: 274ff8d471b9d7b860cf6892f39774e803b9c589bc574f0f6744d106f8c0a169
font_03_sfnt_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 16148 bytes
SHA-256: 00226f0c732f27389252452a84cca056e85d945fe255c3f1f9cebbd5d550edf7