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)
MD5: 648c118a1cce43e2043f7a14078b27d0 SHA-1: 6b4e161c15cf2bb4d0eb197855c4618c0333a2a3 SHA-256: 4f78afe2e755cd74aa46bb5d417426ab647cebd3548668db4ef4f73e795c8cd1
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.antiquestauranga.co.nz/uploads/1/3/1/0/131070146/93e045.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/zixikiboraxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/college_physics_knight_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/muwubeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/mercedes_a_class_2018_manual_gearbox.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/xuzadaxelojuves.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/kolupasulegirodi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/budget_highlights_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0450/9194/6661/files/mordhau_player_count.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

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

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