Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d9c66a745bf4fb…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 08:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67c1d0174cdfde4ecf04a8cfaab6b993 SHA-1: 3c35d484fa7a1f5e9e7e8a10f7c0ed0f95bea8b5 SHA-256: 92d9c66a745bf4fb521bd607f05a5dc2a39d07d51f78e419edd1c6a606ec2e73
120 Risk Score

Malware Insights

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

The PDF document contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body and embedded URLs suggest a lure related to "The crucible worksheet answers", aiming to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL.

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=the+crucible+worksheet+answers
    • https://static.usrfiles.com/ugd/b8c837_dac20c1629db4edea42acf905b7e44bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_d87134b51c754a6f99a83597c7862a2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6db909e128fa4b3083a050ba2fe1992f.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/30438104728.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/verses_about_thanking_god_for_answered_prayers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/66844736175.pdf
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/jamujipagovebuzojidesur.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/10134569105.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/dafuzalogarojirukadajen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soparuvuridove.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_off00005cea.bin
0e22d10f451881803d555aded6f38060a7618ae8df1bd9ed7da0ac17f8204f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEA 5132 bytes
font_01_sfnt_off00006e66.bin
99122d1068734ebdc9695f3e18f4a3d25dd44e13b8f498294eb379b828ea8a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 9824 bytes

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