Malicious PDF — malware analysis report

Static analysis result for SHA-256 993c11bcc746380a…

MALICIOUS

PDF

51.1 KB Created: 2020-08-09 07:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6541b288b89902835fae80290a14cfdf SHA-1: 2d099e763368afb2f8a86d1e84a75b7480c4a08d SHA-256: 993c11bcc746380a34c50cd36284fad455cd4cc40fe9fba0a0e1fc256fcce86a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to download or view content related to 'agriculture notes in tamil pdf'. The presence of a link farm further supports the malicious intent of redirecting users.

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.com/pify?keyword=agriculture+notes+in+tamil+pdf
    • http://files.nikkileahdesigns.com/uploads/1/3/0/8/130814588/a05a6f.pdf
    • http://files.salpiconontario.com/uploads/1/3/2/7/132740670/6866887.pdf
    • http://files.dakshithawick.com/uploads/1/3/1/8/131857527/jokesavomupi.pdf
    • http://bogewi.acdcak420.com/uploads/1/3/1/4/131437615/6108812.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/automatic_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/gifuwotuvewonida.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/jumafupatifof.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/jadawanibikunupapotope.pdf
    • https://cdn.shopify.com/s/files/1/0434/2648/0290/files/23477291887.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/96074457950.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/66577498920.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/autocad_3d_export_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/bujipekerijogovuduwazesow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/tipos_de_intermediarios_en_un_canal_de_distribucion.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_off000087e5.bin
aaac652090960722427389c8e48190ad1b8c85e0f035b0234d9d641d7ada8a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E5 5464 bytes
font_01_sfnt_off00009a6c.bin
630e51021bd217f34bed12fecfdd77889ac55692a1de5385782c6e534bacde2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 10460 bytes

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