Malicious PDF — malware analysis report

Static analysis result for SHA-256 40eb84c86389193c…

MALICIOUS

PDF

113.2 KB Created: 2020-08-04 12:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c292dd9a478b2710fb7ed168e9fa6845 SHA-1: ade5eee561bc5d599b8d9edab4ca09ac25551b33 SHA-256: 40eb84c86389193c4a612871987c279c7c23012aacabc3181759ae91dbcf5514
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a redirector on 'ttraff.ru', which is known malicious infrastructure. Additionally, the document contains a large number of links to Shopify-hosted PDFs, suggesting a SEO poisoning or link farm tactic to obscure the true malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=radiestesia+cl%25C3%25A1ssica+e+cabal%25C3%25ADstica+pdf
    • http://files.rebeccacolless.com/uploads/1/3/1/4/131453650/kubike.pdf
    • http://files.rvmaverick.com/uploads/1/3/2/3/132303230/fuvatunoxe-pebiluvepu.pdf
    • http://files.creativeproducer.world/uploads/1/3/1/4/131482886/7785806.pdf
    • http://files.sketchcoffee.com/uploads/1/3/1/4/131437307/284e1.pdf
    • http://files.uccoh.org/uploads/1/3/0/7/130740318/00a4be73e2.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/torobuwepoboxowetilopewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/catcher_in_the_rye_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/vujelalifuzaxexovixag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/costco_pressure_washer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/8041581413.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/ranitemakulividitutok.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/wolfgang_puck_pressure_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/kuzukirizamizulajib.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/67297407613.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/ilco_key_blank_directory.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/legal_smash_4_stages.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001667b.bin
2be196c092d82763a78c54a1f2664d1280f7e23d7b7599a2b8b5f960648f3a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1667B 5060 bytes
font_01_sfnt_off00017722.bin
7eba8e798704c4f719ffd0b8290f9c3700ed6d6ef191ba0ef91cb1c7af4fa864
pdf-font-stream PDF embedded font (sfnt) at offset 0x17722 17124 bytes
font_02_sfnt_off0001a76b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A76B 4324 bytes