Malicious PDF — malware analysis report

Static analysis result for SHA-256 442045704545ee5f…

MALICIOUS

PDF

41.2 KB Created: 2020-09-18 13:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996828f90f689f60ef9a563995b68456 SHA-1: 63f8dd2db58901dacdb64ce1ea85146a065350b0 SHA-256: 442045704545ee5f2206fbc2bc906aa80009f3fd3d9ccf4bb5c3028974f4c467
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is 'https://ttraff.me/wix?keyword=clickfree+automatic+backup+manual', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'Clickfree automatic backup manual', suggesting a lure to trick users into clicking the malicious link.

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.me/wix?keyword=clickfree+automatic+backup+manual
    • http://tamudeke.creativeassociationservices.com/uploads/1/3/0/7/130740433/bfd520dad0.pdf
    • http://files.fisherexperience.com/uploads/1/3/1/0/131070452/tepavokinovagulixoku.pdf
    • http://files.hypnotyzzer.com/uploads/1/3/1/4/131438510/defowanat-bixefivupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/56007616502.pdf
    • https://cdn.shopify.com/s/files/1/0463/4152/1564/files/mixubuxewato.pdf
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/tamubem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/49670286867.pdf
    • https://cdn.shopify.com/s/files/1/0481/2662/3897/files/84089478599.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/nerexopekixirav.pdf
    • https://cdn.shopify.com/s/files/1/0440/0647/3886/files/89791210039.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005375.bin
301e769e3d9b9bd761a05921f29ab48fdad986b780c9529c31cece57abf4ad6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5375 5092 bytes
font_01_sfnt_off000064a3.bin
5041007623e26e809f55c44221c46fc0c56866a6a8e5ad222bb41c24bea08440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 11008 bytes
font_02_sfnt_off00008a2e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2E 4324 bytes

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