Malicious PDF — malware analysis report

Static analysis result for SHA-256 950de71e32bf0f2c…

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 03:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9057d5c5b9302accc9df0ac08affecff SHA-1: fc39c7cd183a2d2316c3d2abd2a37bd933192002 SHA-256: 950de71e32bf0f2c24b7ceffa987ad5348b17dfc9afcbbe2f63e9bdbce581f77
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link, indicating a phishing or malicious content delivery attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=excel+worksheet+is+grayed+out', which is flagged as a malicious redirector. The presence of numerous links to PDFs hosted on Shopify, some of which are benign and others unknown, suggests an attempt to blend malicious links with legitimate ones. No scripts were extracted from this sample.

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=excel+worksheet+is+grayed+out
    • http://fatolujuz.soaringonwingsofeagles.org/uploads/1/3/0/7/130739826/9e80ee60a5f0d7.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/gabovopimibazuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9878/4422/files/almera_n16_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/2003_acura_cl_3._2_type_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/wakinusazeregov.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/biblia_ortodoxa_vechiul_testament.pdf
    • https://cdn.shopify.com/s/files/1/0430/6170/6903/files/gipavatedutamur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/express_mens_pants_fit_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/kibudawekuvuvotek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/dubobobarebipose.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_off00006000.bin
52e06501175dc07ba6ba382ed4d83f228bccbd51a5fb858f11a2f218a935c7f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 5484 bytes
font_01_sfnt_off000072b6.bin
aa5386a2dd28d13b188dd6e7ea96c83ee82acdb2ce07858184f217af4a45bdc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B6 9592 bytes

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