Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c3153f77419d6d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 23:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6297988ce6e29f6efb4dbf5ebd9bd0a6 SHA-1: 5654c7aae0e5964cf05669cd710b8312644566f4 SHA-256: c6c3153f77419d6d52905a513758af45dfbd7d9bac0feffb50af11f7aa5d49bd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'printable preschool worksheets letter j' and a URL that matches the redirector link. This suggests a social engineering lure to trick users into clicking the malicious link, which is likely intended to lead to further compromise.

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.com/wix?keyword=printable+preschool+worksheets+letter+j
    • https://static.usrfiles.com/ugd/df4650_2ffe31b0d9424a6d8e541a7c344b3dd7.pdf
    • https://static.usrfiles.com/ugd/d54300_c1470708b18b441e898acb9baa637d5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_88f9f808c7174413afa36194e9306ed1.pdf
    • https://static.usrfiles.com/ugd/8b2c09_3950ef36d8f5458e8175b0148e0f99b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_317bc0550ebd4c2b950a42dea582c972.pdf
    • https://static.usrfiles.com/ugd/89c6ad_99cbcf5d80024142aeed440ca1f081a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2709baaf22c43938472f80dc81ba666.pdf
    • https://static.usrfiles.com/ugd/b8c837_702f54417be04f348fcd7bf88b2809b7.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/459275893.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/50299688887.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f20a658b6594a728d1e632be534843f.pdf
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.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_off00006c38.bin
a22a54049ada5bab52164e9d422728b8052e323ea7df06505be2e6b2331bf3b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C38 5392 bytes
font_01_sfnt_off00007e8d.bin
74cfc5cd1f58cda487394711dd393db6ab59cd787a376363bc1cf4bf885a4325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 12096 bytes

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