Malicious PDF — malware analysis report

Static analysis result for SHA-256 261abe49d813c243…

MALICIOUS

PDF

70.5 KB Created: 2020-08-20 21:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c3bad78516932bbcd17aff4910cefd SHA-1: 4102e3639fa6cc80a365de6b6257faf57e84c7fd SHA-256: 261abe49d813c2433d05ff1842a9c1be0d57b67b5eac483f7e066a4ec564329d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=examiners+report+edexcel+history+2018'. This URL is likely used to redirect the user to a malicious site. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=examiners+report+edexcel+history+2018
    • http://files.2020idocs.com/uploads/1/3/1/4/131482886/8a665a60c50913.pdf
    • http://files.tightlinesflyfishing.com/uploads/1/3/1/0/131071037/6299ee2b3d88.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/susesavikokisivabasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/az_103_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/teoria_del_liberalismo_economico.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/web_url_to_converter_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/kozulalufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/ansys_cfx_solver_theory_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/wazibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/90507468588.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/36563908564.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/nujigojunanavidaw.pdf
    • https://cdn.shopify.com/s/files/1/0441/2240/7064/files/5070761140.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/57715427601.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/candy_luke_davies.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a46f.bin
2e51354a73f50b425c6dab26bbda15981fef77742a7e1efe303f9222c6cbc7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46F 5748 bytes
font_01_sfnt_off0000b7db.bin
c20d787594334c4f983f82f7ab04722063292456849e74aebb53180d1e8b24d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DB 15800 bytes
font_02_sfnt_off0000e901.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 16204 bytes
font_03_sfnt_off0000fe2f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2F 4324 bytes

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