Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cab65764fc5f51…

MALICIOUS

PDF

60.4 KB Created: 2020-08-30 23:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1cd32d255ae99e9f7f59dc1e017da5 SHA-1: c10a3dbb113319d4a2e6053a4e1b014a79e64ad4 SHA-256: 29cab65764fc5f51209b7af82a47b7987585d9f17f27e800ebdf1615f9fcdcbe
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'free 3d text logo psd design mockups' and the malicious URL. This suggests a social engineering lure to drive traffic to malicious infrastructure. The presence of numerous links to static.usrfiles.com, while marked as benign, indicates a link farm strategy.

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=8+free+3d+text+logo+psd+design+mockups
    • https://static.usrfiles.com/ugd/b50c55_d02cfaee4fba4c92adc4a3626b09f805.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f7a7240fc547119f6dc051bed9310f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bce76958acca4ee8b33d930e28c5ea4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5092dca49054b37aaecb70335dc9c6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bf9084d3be24966a898327ec7269829.pdf
    • https://static.usrfiles.com/ugd/b8c837_c10a52c0a0654b4b8b479bb8704fecf0.pdf
    • https://static.usrfiles.com/ugd/affb4a_cb6fd12d8ff448ce991a47f3c1e988ed.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_0d69ab72261a4a70b947ecf966cef3b2.pdf
    • https://static.usrfiles.com/ugd/a91264_4ee8a6134e474bb281aa28d7abf8f3ed.pdf
    • https://static.usrfiles.com/ugd/429b25_5a7b415503f34da8856a6299fbe84cc4.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/modern_automotive_technology_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4954/2041/files/book_of_mormon_institute_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/81817462853.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_off0000a47c.bin
8bcbc5659fc87c8ff4de072a3fd1eb6a0f0c8edc1caeab46374fffc4694d2bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA47C 5660 bytes
font_01_sfnt_off0000b7b8.bin
213abde8caa78cea1f7933c23181e94ed7657237b2ce9eb1b78549e7c8c6fc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B8 14260 bytes

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