Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97745651d2f249f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 10:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e7436d90279773ee90b87315356bf80 SHA-1: 029ae1473f70698342159c0551a98901e485a6aa SHA-256: e97745651d2f249fd007ee6fe9dbab0f5e50ef1025cb18d68453a1c0aea40d77
152 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 resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=barakhadi+marathi+to+english+pdf+download'. The document body also contains this URL and other links, suggesting a link farm or redirection scheme designed to lead users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=barakhadi+marathi+to+english+pdf+download
    • http://files.americanseptember.com/uploads/1/3/1/8/131856950/satefosile.pdf
    • http://files.cavway.com/uploads/1/3/0/8/130813991/2c177218c9d56b.pdf
    • http://files.lucywilliamsonphotography.com/uploads/1/3/2/6/132683087/5719950.pdf
    • http://files.drivelearning.org/uploads/1/3/1/4/131438784/roxasiziluvus-xerunokezolemu-perulubuw-ganika.pdf
    • https://cdn.shopify.com/s/files/1/0437/6641/5514/files/soxutemobifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3690/files/33939031070.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/fuxadifurerebotukolenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/tiludesokidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/10772733087.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/62377462891.pdf
    • https://cdn.shopify.com/s/files/1/0448/6030/9665/files/ebit_eps_analysis_capital_structure.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/xujasisanaduvovubuzepal.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/jolinubogewinog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/vodafobupoziwapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/37240908321.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_off00004d51.bin
0891a98fa653964e00bd9f4ef7020ee7c399b5f6f380b1e87944c1f57d8f2c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D51 5660 bytes
font_01_sfnt_off0000607a.bin
dd587010a087f54949620edc29528bc643390edb21a2c1198f2288f12c186f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 9752 bytes
font_02_sfnt_off000081bf.bin
80cb66274620589ab9c8d1dd4bb3301369d320427890697c7e149eedb13e87f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BF 6924 bytes

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