Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b96dc19f27dd25…

MALICIOUS

PDF

36.7 KB Created: 2020-09-17 00:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0032b511da7497196b874bc35bc0783a SHA-1: bf418d9094c226e7c1b27b54480bd809adb2a7f1 SHA-256: a8b96dc19f27dd25f01b3744cbca9434c52de1a1ebb6258b13e5bc16d6a29d16
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body contains garbled text but also includes the URL 'https://ttraff.ru/wix?keyword=dyson+ball+dc24+manual', which is associated with malicious redirector infrastructure. The presence of numerous external PDF links suggests a link farm or a mechanism to distribute further malicious content.

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/wix?keyword=dyson+ball+dc24+manual
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/10887574001.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/jozofosaxonuju.pdf
    • https://cdn.shopify.com/s/files/1/0437/5832/1818/files/59530741676.pdf
    • https://9e0fa6e2-9a0f-435b-a409-fb0d85e14497.filesusr.com/ugd/e50c99_a93d999232e540cfa6abd2cbcc1fbd9e.pdf?index=true
    • https://7f0dcf6d-1fb4-462c-8d50-c254a85a17a5.filesusr.com/ugd/314c35_e800ff9a1124464388ac4e571cc555ae.pdf?index=true
    • https://f852e033-cf7e-4e6a-8324-52500464955d.filesusr.com/ugd/143c98_3c83d4cc37c54f89ae18d6364acf224a.pdf?index=true
    • https://3fb11d06-cbc0-4350-bfa7-62f22b38254d.filesusr.com/ugd/db1da1_7608b6883b064a7ba105dd563a479a1c.pdf?index=true
    • https://397f4a7c-b4ed-4c40-9402-74d927982a28.filesusr.com/ugd/696117_ab0d335760174289a0aa27c6e88b14ca.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/tofipumogaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/report_form_balance_sheet_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/vocabulary_words_english_to_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0465/0552/5398/files/the_modern_gentleman_waters_cologne.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/26698275084.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_off000050e3.bin
cb1f2ef50eae462ae62e1e9b1cd160a4dfb4fe273d715b4dcc154f0e99524ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E3 5452 bytes
font_01_sfnt_off0000636c.bin
5b365655834d9e079258aceb6d129cb71bc2abeb491227d963b44c2e893a0f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 10336 bytes

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