Malicious PDF — malware analysis report

Static analysis result for SHA-256 9798c5fb4551fa23…

MALICIOUS

PDF

68.8 KB Created: 2020-08-14 07:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7f30cc66c5fd5e366141daa512a93dd SHA-1: cad7eb596f4f21c4bf49be50d47365b16e95089e SHA-256: 9798c5fb4551fa236404d43c75168f4a515e1ff6665907852f84294c90116711
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=hosanna%20telugu%20songs%20book%20pdf'. This indicates the document is designed to lead the user to a potentially harmful website. Additionally, a PDF SEO link farm heuristic was triggered, suggesting the document may be part of a larger scheme to distribute malicious links. The presence of a visual download button lure further supports a social engineering attack vector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=hosanna%20telugu%20songs%20book%20pdf
    • http://posera.mintzathletics.com/uploads/1/3/1/1/131164250/fulavewubowemul.pdf
    • http://zenoxo.panthercreekptsa.org/uploads/1/3/0/8/130814328/ribubarajugi.pdf
    • http://files.mostcertainlytrue.com/uploads/1/3/0/7/130738978/1e3d4291c9829d1.pdf
    • http://files.learningforcharity.ca/uploads/1/3/2/6/132695432/8496480.pdf
    • http://files.womenmakingascene.com/uploads/1/3/1/4/131437308/4eceaeba5.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/mudabavosizojakexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2402/files/69618692405.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/75212948378.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/85421472108.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/foundations_of_mathematical_analysis_johnsonbaugh.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/jowomarekasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/82701662721.pdf
    • https://cdn.shopify.com/s/files/1/0453/3105/4747/files/camera_translator_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/electrical_engineering_mcq_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/agricultural_machinery_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5667/files/30596111635.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/zibusiruvupu.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_off0000b8d1.bin
7d8caf531be7f13d5f3ba11a217956516144af775d94fbb3ead7c5f2a18d1c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D1 5112 bytes
font_01_sfnt_off0000ca41.bin
c6e86ec612b24f2c6fdf3ecf17459424003e1b93f78ee8a9fb2d5094d6680c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 14236 bytes
font_02_sfnt_off0000f797.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 4324 bytes

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