Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4f8101cf2c9172…

MALICIOUS

PDF

66.9 KB Created: 2020-08-30 16:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 779f76397ab599c2a59bac1e445f881d SHA-1: 9d90a443b5db67522fb7adaf3bc1a51303a9900e SHA-256: 7e4f8101cf2c9172ae9a050a43fce156cdb5a7b2cdb65ce0c13c0131899fce4b
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One of these links, 'https://ttraff.cc/wix?keyword=radio+shack+dx-390+schematic', is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL. The presence of a mass external link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.

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/wix?keyword=radio+shack+dx-390+schematic
    • https://cdn.shopify.com/s/files/1/0431/8865/0141/files/story_central_1_student_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/bogixewuvigurenelozugit.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/57762869269.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc9a486b9604967a546ce3f8cd15726.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3aa0198a1104b8b893b990606bdf3ff.pdf
    • https://static.usrfiles.com/ugd/bfbc46_3bcd3fff61ae4cd6a233d9180131b17e.pdf
    • https://static.usrfiles.com/ugd/bae363_bb57450f1cf64bcfbe954835e0a378cf.pdf
    • https://static.usrfiles.com/ugd/e3ff21_2af91502ac9f472e8fde127a78e5f76f.pdf
    • https://static.usrfiles.com/ugd/eed56f_6c3fa3e359c443868b1ea8e8e25f9045.pdf
    • https://static.usrfiles.com/ugd/edb4a7_d8d5ba487f0f448ea5b60b77f9bf9d7e.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_off0000c5de.bin
5aec11d1641d7f0eeac540009cab1e22ee3b0a39dfcdc54258a21b5e1265dbe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DE 5684 bytes
font_01_sfnt_off0000d91e.bin
b185ff865a4bd9064f99c822cbaf00063c46abaa17979ab4d799b23c1f2ed7f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 11880 bytes

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