Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d0090d9cb12768…

MALICIOUS

PDF

40.2 KB Created: 2020-09-02 11:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6539adb11f38aad20c24fbbeff23064c SHA-1: 4b975ccefc716ddc1b7f8808d8c4fee7018b07fa SHA-256: 82d0090d9cb1276880e34b8b42c5c4e99700d58710e3b3a47a049963f22ae5ce
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=freeholder+consent+to+let+letter+template'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are benign but serve to obscure the malicious one. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF filename, suggesting a lure to trick users into clicking the malicious link.

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=freeholder+consent+to+let+letter+template
    • https://static.usrfiles.com/ugd/41a0b6_04d6cf4f26134259811a7808ad07bf80.pdf
    • https://static.usrfiles.com/ugd/b8c837_20e37c5d833c42aeb7bbb095db66a8da.pdf
    • https://static.usrfiles.com/ugd/74e905_257b96c911f841a5be250b925027838c.pdf
    • https://static.usrfiles.com/ugd/e3834b_7e241cfc6c50461c8196a3507b7100cc.pdf
    • https://static.usrfiles.com/ugd/affb4a_8c0fd7899fb147a2b681c1a5936c3188.pdf
    • https://cdn.shopify.com/s/files/1/0436/9494/8517/files/bosch_gco_2020_spare_parts_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/kafowijirutizovepazu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6706/1910/files/page_fault_in_non_paged_area.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/git_move_changes_to_new_branch.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/nokiriborefone.pdf
    • https://cdn.shopify.com/s/files/1/0438/2762/6134/files/lagu_batak_islam.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/58316998909.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/john_deere_314_manual.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_off00006099.bin
b7c607b502bc7932ab26693d127ea0bf297e2a095cc50253aa92230a14663716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 5268 bytes
font_01_sfnt_off00007255.bin
f81c2690b875d5fb81ea1b6c65dfbe0f4066cbbf2f527eff8839717ef0c48fc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 9852 bytes

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