Malicious PDF — malware analysis report

Static analysis result for SHA-256 9586c867f9bda0ab…

MALICIOUS

PDF

68.7 KB Created: 2020-08-30 09:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aefa66de7b6960a50040759199b6d2c0 SHA-1: 0203cc60157087b151840da7a5cd4eedeb104db2 SHA-256: 9586c867f9bda0ab55444e7e5d85aad060c865da25179064063cbc9a008ef557
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of an SEO link farm. The primary malicious URL identified is https://ttraff.club/wix?keyword=keep+on+the+shadowfell+5e+pdf, which likely serves as a gateway to further malicious content. The document body itself is heavily obfuscated and contains embedded URLs that point to benign-looking Shopify domains, likely used to mask the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=keep+on+the+shadowfell+5e+pdf
    • https://static.usrfiles.com/ugd/158fb9_2fd12267161145dbac23a1e8da83ff76.pdf
    • https://static.usrfiles.com/ugd/b8c837_b01fc56c381f4779bf5c7aad3101d6d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_838efc8a3518498f8efab51304fe55c0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/hollow_knight_modding_api.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/najigirujazabiwupiruwuto.pdf
    • https://cdn.shopify.com/s/files/1/0438/8660/8536/files/carnivores_ice_age_pro_free_ios.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdf
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/jojimesozolepirijata.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/cincinnati_1812_shear_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/vaughn_bioethics.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7607/files/66471044346.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/night_figurative_language_worksheet_answer_key.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_off0000c267.bin
b621a6216c907e4b82f101fb1a10df1c85abcb1077d35c68169e9e4727c41070		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC267 5216 bytes
font_01_sfnt_off0000d440.bin
aa2c88f9f7e200ef893222113f79c618636d55a70f157ddf0a52f3cfb9c1d8ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD440 15916 bytes

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