Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ae1f230ad5a6fc…

MALICIOUS

PDF

56.1 KB Created: 2020-07-28 23:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a79384e196e1e07bbf7f613d6823e3c0 SHA-1: a62c7f16bb1c7299d39ab119b2b1efc904102de2 SHA-256: 87ae1f230ad5a6fc8eca5cba749cade4bdcd4ca559ad895c5208d422d2c1a03c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links designed to create a link farm, with a primary malicious redirector URL identified. The document body, though heavily obfuscated, suggests a lure related to a 'motor vehicle log book excel template'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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.cc/pify?keyword=motor+vehicle+log+book+excel+template
    • http://files.holisticcoachandcounsel.com/uploads/1/3/0/9/130969048/letulelu.pdf
    • http://files.tomaah.com/uploads/1/3/1/4/131438274/dabesuwifutopep-weselobuwole-jugaxovit.pdf
    • http://files.consciousjourney.ca/uploads/1/3/2/6/132681293/e4725575cd1a757.pdf
    • http://files.sugarandspiceshreveport.com/uploads/1/3/0/7/130776130/acfeeeb8.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/54562348226.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/85179665898.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/8038289755.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/31925372451.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/82357122590.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/76794546227.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/80053986564.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/jeropejabidonegabilekavis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3280/4504/files/9476342152.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/lexubarapage.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/bogovafaxorasebegifaduzev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/65583507865.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_off00009e0f.bin
47ac1b98b91fc6ca27a3eba2944ceb7997bd4c32eb8a237a199e0418f3d639d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0F 5188 bytes
font_01_sfnt_off0000afc8.bin
a9d7e058317ac0499ef1c4e3fcf96e80f29a0426ce9b26f8fb2e15bf271b2db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC8 10296 bytes

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