Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5a0e3d31aba1bf…

MALICIOUS

PDF

48.9 KB Created: 2020-09-02 02:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0d1d5c97a3c7b5b52726ae906c59215 SHA-1: 752a78ff758450dceff95ee8b72397517c30e43f SHA-256: 8a5a0e3d31aba1bf8c236856e0a504707cd83be09eda3f09a5184933e891eceb
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=delhi+satta+bazar+faridabad+report', which is likely used to direct users to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, consistent with a link farm strategy.

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=delhi+satta+bazar+faridabad+report
    • https://static.usrfiles.com/ugd/8e1900_223e1a1ed0d94dfab012fe5c22d46dc4.pdf
    • https://static.usrfiles.com/ugd/5b9a87_7e5fec06aa744932aeaff864ab4d7c48.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd678c7ef524c07bc309c103da931d5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8173/files/14709960970.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/6516915596.pdf
    • https://cdn.shopify.com/s/files/1/0448/1577/7954/files/465745274.pdf
    • https://static.usrfiles.com/ugd/d43733_1e98696bb30e446e80e83289890313ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_79e5621b3b93465c933d78aa27bd31cc.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/descargar_mapa_bilbao.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/slipknot_vermillion_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/22635086004.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1911/files/nuvegujikudaraguzilenusif.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_off0000639d.bin
7a493ffdea41f0775f18704b4ab8c7cf2af8fdf1857cdf7cdf7805c9374e1159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5000 bytes
font_01_sfnt_off000074b0.bin
2db8dd1e11d8a5df46bea4684c61679c6a6a267473e5e7b31bfb4d2ddb7e072f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B0 17404 bytes
font_02_sfnt_off0000a8bc.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BC 4324 bytes

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