Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c2029b3a0ce12c…

MALICIOUS

PDF

36.5 KB Created: 2020-09-08 09:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd0fc3405d845a9685da2d112eb30623 SHA-1: c507bd76bf260166d608f6a02a330c39a529a770 SHA-256: e9c2029b3a0ce12c666ccbb108bc7acbcbb7bd81b0f1d5fb1c1ffeca043bd1eb
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=mandated+reporter+state+of+minnesota', is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document's content appears to be a lure, attempting to disguise the malicious link as relevant information.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=mandated+reporter+state+of+minnesota
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/ra_9485_anti_red_tape_act.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/8712123445.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/3rd_grade_math_assessment_test.pdf
    • https://static.usrfiles.com/ugd/4cd51e_dc2aeeaf6d8a43588f2c8e8d4d3a33a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec4a275d710244c5a2b50610b0d6abd1.pdf
    • https://static.usrfiles.com/ugd/9bd8c3_bfb7b64a210e45b49ea12c4b518f0998.pdf
    • https://static.usrfiles.com/ugd/98e2de_18e19cf7be524fd7860a6d31b9c17059.pdf
    • https://static.usrfiles.com/ugd/db93e9_f313a9b6a73e41cc8f755b31578d8681.pdf
    • https://static.usrfiles.com/ugd/111c46_02a1d80eaaae4574846b828a370bcdbd.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_off000052b5.bin
973453ee88ee182169c0eba77bbf68e18f121b2c71bd66fe5884cead8a51b678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B5 5160 bytes
font_01_sfnt_off00006434.bin
ffb28263e51c3a80a0bf681f94e6cd5a33bf101fd48813f1ea973a4f09c1f8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 9788 bytes

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