Malicious PDF — malware analysis report

Static analysis result for SHA-256 37369c482a803f00…

MALICIOUS

PDF

95.2 KB Created: 2020-07-26 23:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fee7eb382363e05365e480a61b0bba0a SHA-1: 4a7763a1494365ab670dc7ff43c76143e500ad89 SHA-256: 37369c482a803f00c171ca35dedad945a238419ae696abbb83817f4934196a09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. It also contains a high heuristic for a browser extension installation lure, indicating a social-engineering attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a search query, suggesting it was generated for SEO purposes to attract users. The presence of numerous external links, many pointing to Shopify, further supports the SEO link farm tactic.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=fm+radio+station+software+free
    • http://files.dartendistrict.com/uploads/1/3/1/8/131856381/jarukid.pdf
    • http://files.cairnsclassictours.com/uploads/1/3/2/8/132815118/ad9d8cbcdba.pdf
    • http://files.innerdancer.net/uploads/1/3/0/7/130775002/tepegopoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/87180349710.pdf
    • https://cdn.shopify.com/s/files/1/0434/5964/1496/files/85938424557.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/kuguwajevawidagov.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/javepadan.pdf
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/goduxusi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8056/3350/files/51417896071.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/tazosilabimil.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/66619037518.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/11077229847.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/porolevexiwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/77292116655.pdf
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/kogogok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/88758694851.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/48594554697.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/60872266588.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e50.bin
d0ed8e3c2dfd935ec0b515d22f2d8b9006262233a0c6cdc57d7118535e6d7e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E50 4856 bytes
font_01_sfnt_off00013eb7.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB7 1800 bytes
font_02_sfnt_off00014745.bin
0ca92e0ee896801f00e79c1b0207a7df5a11206d285ee1b48ea46a99be951538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14745 11800 bytes

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