Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a11a7ea48366b70…

MALICIOUS

PDF

34.3 KB Created: 2020-08-30 10:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54fafb7092eebd48e7f4adc2b35767e8 SHA-1: ececc5f6dc87278b433bfda0d4817159c0dbef37 SHA-256: 7a11a7ea48366b70196d5fae78526474276542ebaccbc4ed6a58f7e66de3d133
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=free+eshop+codes+no+survey+no+download'. The document body also contains this URL, along with numerous other Shopify links, suggesting a link farm designed to attract traffic. The primary purpose appears to be directing users to the malicious redirector under the guise of offering free items.

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=free+eshop+codes+no+survey+no+download
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/14181186070.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/kugota.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/vosezezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/wipubifuwa.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4815c83b5ea43cca81076e6b930a981.pdf
    • https://static.usrfiles.com/ugd/b8c837_61705d94a7234f11af07d7fbdb21bd2c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/comparative_superlative_exercises_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/selal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/4524064599.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/6554091118.pdf
    • https://cdn.shopify.com/s/files/1/0462/4475/7664/files/6871366036.pdf
    • http://bit.ly/2Oj0lMO
    • 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_off00004cee.bin
1e4e62c343a433585cdafbf00a27f9647b31661a6aabddbbc1ae4fa3c7023866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CEE 5368 bytes
font_01_sfnt_off00005f41.bin
98b04b1538d4599cafca84acfde3f66a2b7b2c73d01eb4603f6049d074ab4214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 8588 bytes

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