Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84405c681d0ca88…

MALICIOUS

PDF

41.0 KB Created: 2020-09-17 17:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bec1c2b6d4de78f04593897e43bc052 SHA-1: 941d28e677a2d68a5baa687c594996728635a4f6 SHA-256: d84405c681d0ca888df8c39f1529906039297badcd816a21d3cb856ab2a82f80
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One of the primary links, 'https://ttraff.club/wix?keyword=cities+skylines+scenarios', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the intent is to redirect the user to malicious infrastructure.

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=cities+skylines+scenarios
    • http://bavebup.lakecountyiltransition.com/uploads/1/3/1/4/131438539/9653562.pdf
    • http://files.jackclutterphotography.com/uploads/1/3/0/7/130740551/1730970.pdf
    • http://files.fleurdelizcandles.com/uploads/1/3/0/9/130969426/likuximu-kenuburigaku.pdf
    • http://files.quickguidetocoincollecting.com/uploads/1/3/1/8/131858044/xesiwe_jeduvofigep_pabor_fegixuxitaso.pdf
    • http://gunavux.jenroweaicp.com/uploads/1/3/2/7/132741100/bapimoj-didivopefum-sapiduraju-wiwejakidexof.pdf
    • https://fa9a6821-2f7a-43bc-8426-a4be0fc94e3
    • https://2a99dc03-066a-4d38-897e-b3d7fe773e60.filesusr.com/ugd/221eaa_fb604d9e030d4e24b9435f2cf859275e.pdf?index=true
    • https://02dd7e57-187f-4ace-95e9-61464b1ed4e8.filesusr.com/ugd/314c35_1ae1f9bfb440492ba50f25a1bcb2d112.pdf?index=true
    • https://fad55ec3-cdd7-4725-a51c-8178e85f58ce.filesusr.com/ugd/d17951_27a8ca73be0c402892faf8c65845a6f6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/immediate_resignation_letter_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/7010/files/volemena.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdf
    • https://cdn.shopify.com/s/files/1/0447/7334/3383/files/indesign_a4_portfolio_template.pdf
    • https://51500f8b-fdd3-4b0d-b921-f3417294e90d.filesusr.com/ugd/03ae60_aeaa6e5c567e4bd59ed177585cccf1fe.pdf?index=true
    • https://f869d6fe-43f7-4709-afdc-42b4d5907af6.filesusr.com/ugd/28b3f7_54e9d3c81bb7486690f4e283591cbf42.pdf?index=true
    • https://fa9a6821-2f7a-43bc-8426-a4be0fc94e30.filesusr.com/ugd/d7d6cd_9844ab682f7d4a839924309e92da180a.pdf?index=true
    • https://c288df73-8656-4f24-a0a7-1c9c69ac61be.filesusr.com/ugd/2994dd_477fd5f9c2e343eeb1cffc35ac4378f9.pdf?index=true
    • https://9448440f-9a59-4f84-8954-8e8a304280d5.filesusr.com/ugd/7a11b0_5df3eaddf3544f7aa299a22aa867f999.pdf?index=true
    • 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_off00006367.bin
a0552bfcf9b010f3a084535026e506051cc6da61b36f51ac81472ecdf0a205b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6367 4864 bytes
font_01_sfnt_off0000740c.bin
999fb21c0bea4a4bfe28e83942816d54f978c66ea0cabc578d5842c52a62486b
pdf-font-stream PDF embedded font (sfnt) at offset 0x740C 10332 bytes