Malicious PDF — malware analysis report

Static analysis result for SHA-256 469a919cb2799cff…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 01:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d12f1f61153824f8d2835c94624c34c SHA-1: 5e50efd3e20f4d149353943260ed510e01472efc SHA-256: 469a919cb2799cff5963ed3c0ccef34ce0413ad4e952d565455a5179ee61fbb3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify?keyword=blood+flow+in+the+heart+pdf. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=blood+flow+in+the+heart+pdf
    • http://files.iyasako.co.uk/uploads/1/3/2/6/132695543/f518a0758d004.pdf
    • http://zubulujo.mcdecorsolutions.com/uploads/1/3/2/7/132710712/c8a5b2.pdf
    • http://budaxabav.chiefpricejrotc.com/uploads/1/3/1/0/131070109/nagox.pdf
    • http://files.alberta-legal.com/uploads/1/3/1/8/131871907/datisuwu-gurobuguli.pdf
    • http://tolikuba.nomomani.com/uploads/1/3/2/6/132682883/9a1eb91938d.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/adaptation_of_leaves_for_photosynthesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1727/files/81820165386.pdf
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/fevimorigila.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/cancionero_de_acordes_para_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/22628834667.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/mupawosisafiwovapusov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/nuzivisitobupuzujosafaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/46387602070.pdf
    • https://cdn.shopify.com/s/files/1/0435/7983/4531/files/kukeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/castrol_magnatec_5w30_a5.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/dipoxunuduminutad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007225.bin
acd2658ea042a09474d7dc34e7e6257d30db0321afb03ca6dfdcb053d2c66bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 5092 bytes
font_01_sfnt_off00008381.bin
9acaa80e2b35557a4f65a1ea2c1a637757ce80560a3537fd1976153d4a075eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 12720 bytes

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