Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0d99a5d095ca17…

MALICIOUS

PDF

38.7 KB Created: 2020-09-19 15:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038d6163520f8d7eccb380b3f512e5dd SHA-1: eb5bce0434db95f46a4e70701ee47506e13fb684 SHA-256: eb0d99a5d095ca17f58009b8071ef6b98735b6a6e6aa9dcf107e2c6aee0849ef
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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.ru/wb?keyword=financial%20statement%20analysis%20example%20pdf
    • http://fenapag.bamabelle.org/uploads/1/3/0/9/130969723/214525.pdf
    • http://gusidisuz.hatcherforgeandleather.com/uploads/1/3/2/3/132302978/d5642b8dbed4.pdf
    • https://ef4972ff-852e-4f0c-b8f2-90b751bca31b.filesusr.com/ugd/1b6cec_c8d727f92262432895469f0b894b148b.pdf?index=true
    • https://f99cea89-0836-4abf-ae0c-e8242f65018a.filesusr.com/ugd/98857b_1b0346ec146544eb9d8eace3e111b9a2.pdf?index=true
    • https://1e5ee6db-c878-4f33-a4c1-d17e8bbb5727.filesusr.com/ugd/98e298_e9218706ba7f4d4192cb06f43b4749b0.pdf?index=true
    • https://abe44b56-0a15-42c1-ac39-55c62be443f4.filesusr.com/ugd/409ca8_a962c915e5eb444f81f0ef8c2e890a95.pdf?index=true
    • https://4d584bd3-2d19-45de-9abb-0e6f5b0e6cfa.filesusr.com/ugd/f1780b_f604614539c74438af49bd2f72112df2.pdf?index=true
    • https://a5735765-787a-4afe-a0ec-607497384c8b.filesusr.com/ugd/96a426_77fcfeb65dc547758741e4b6e5148902.pdf?index=true
    • https://384d008a-a85f-4287-b41b-236a6f5fc5f4.filesusr.com/ugd/c12414_ba385531d93242e8b1beec69c76f1591.pdf?index=true
    • https://7a1fa1e8-d4b7-40d9-bb0c-1e59d4e83b2a.filesusr.com/ugd/1c44ce_6d27678aee1c42a8a600e529baba1b4c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/81689108824.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/xovewifibofolugifoz.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_off000058de.bin
9f53ca0113561bb8b69d5e05554a395b610996dfba733455eed466b4bd7dc2b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DE 5332 bytes
font_01_sfnt_off00006b02.bin
7dbc0df5fa2489c6557b12f41cda6025f60c0d4316564a326f43c1376b7d115a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B02 10204 bytes

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