Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a24de8b63803433…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 06:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c223a668f6a121e833ce699220b069bd SHA-1: 816bb206733e2c598adb8672fbb62c3dc6886716 SHA-256: 8a24de8b638034334a39009ca845fdc44a49a0edb53dff4155cd47751b7aaa56
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL, 'https://ttraff.cc/wix?keyword=arvin+meritor+axle+parts+manual', is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a link farm or redirection scheme designed to lure users.

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.cc/wix?keyword=arvin+meritor+axle+parts+manual
    • https://static.usrfiles.com/ugd/0cd3a8_5f148845b09f4d8e9fd5fe17710214cc.pdf
    • https://static.usrfiles.com/ugd/c12414_88a266e27c9a4c5dbebb198bb508128b.pdf
    • https://static.usrfiles.com/ugd/e3ff21_63314486e45444e9818f4a41dc44138c.pdf
    • https://static.usrfiles.com/ugd/b8c837_623c16f8a7a44d1eaae6d3bf95a21b91.pdf
    • https://static.usrfiles.com/ugd/97634b_3454d8773f264f11a88af737bb0ee16d.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ced84cf33f4380a7f992ef97d4d2bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bd5f229bb2d4ace8ce9d91a1189196a.pdf
    • https://static.usrfiles.com/ugd/10b11f_1026de1d438c4c55a51f1bffa22402a9.pdf
    • https://static.usrfiles.com/ugd/493135_622be861f2fc4872818ded30a5c879b6.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/42649283667.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0459/7006/3520/files/electroretinography_with_interpretation_and_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2871/7463/files/85777814759.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/10854010866.pdf
    • https://cdn.shopify.com/s/files/1/0462/3899/0496/files/jumbled_sentences_exercise_for_class_6_worksheet.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_off0000669b.bin
38d597df63aa37e2a0066a76c54aa66574f7590c511dd726535ce2118dbc14ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5084 bytes
font_01_sfnt_off000077cb.bin
5a5783d4846405c89dcf9c8c744d38a2966ac23320725aeea3e80b251b0cfcc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CB 10956 bytes

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