Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf32a508bfd4a1a5…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 09:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 074df73b691c90c3394baa428d1f315b SHA-1: 15d936387818acfd4d362aa1119b4280f88ede12 SHA-256: cf32a508bfd4a1a5c3029f819ac1711687d66de13ae8b878a7b632c6c4bac0b6
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating an attempt to lead the user to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'insulated roof sheets' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO-based link farm heuristic.

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/pify?keyword=insulated+roof+sheets+tile+effect
    • http://files.wisdomforwarriors.com/uploads/1/3/0/8/130814980/4aae0c8efeeecc8.pdf
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/couper_un_par_page.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwofejimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/muniro.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/87999680635.pdf
    • https://cdn.shopify.com/s/files/1/0431/2324/5216/files/tamopamiluxapudatamop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6065/files/xelewizu.pdf
    • https://cdn.shopify.com/s/files/1/0465/9393/3477/files/96616938933.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/zukogimomodomusa.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_off000054a1.bin
0809638c567a10141ea46ab147792f4e46f7a6e4bd311d2b76fe94b24b97f287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A1 4928 bytes
font_01_sfnt_off0000654c.bin
c64b7a358e053c6c4e4a07808d5745eb57c3bc7c15668dff809d8fc5b25fc7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 10752 bytes
font_02_sfnt_off000089e6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E6 4324 bytes

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