Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c8d4c47daeceb0…

MALICIOUS

PDF

48.3 KB Created: 2020-08-24 18:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 965599c6ea61b85c4c0491c51ad8c991 SHA-1: 192483cd8179d9d9a9f48ff0c0c977224687f81a SHA-256: a7c8d4c47daeceb0d512ec1b77eea1b2c34c9c2742e131bd06d42061b49e5ddc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=marfan+syndrome+exercise+guidelines'. This URL is presented within the document body, suggesting a social engineering lure related to health information. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, but one suspicious domain 'nupigiwif.baysidequilters.com' was also identified. The primary malicious link is the most critical IOC.

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.cc/pify?keyword=marfan+syndrome+exercise+guidelines
    • http://nupigiwif.baysidequilters.com/uploads/1/3/1/8/131856124/2823420.pdf
    • https://cdn.shopify.com/s/files/1/0434/5754/4342/files/vutizugi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/storyboard_vk.pdf
    • https://cdn.shopify.com/s/files/1/0464/8802/7304/files/2018_movies_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdf
    • https://cdn.shopify.com/s/files/1/0435/2062/2756/files/89792593890.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/dictionary_cambridge_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/75030203577.pdf
    • https://cdn.shopify.com/s/files/1/0446/6094/9155/files/andante_andante_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/59359772397.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5409/files/xoranedojibirelarogedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.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_off00007c00.bin
11d186db866f83e95e7b046d61513f875c6f044f6402bfd74bafd7cf2c34329a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C00 5516 bytes
font_01_sfnt_off00008eba.bin
2c778a93d7a1230a6a3612e602b7261c344c1887200eb45302b6ec21879cb0c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 11164 bytes

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