Malicious PDF — malware analysis report

Static analysis result for SHA-256 128863f384d39d00…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 11:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d48cfacd102932e71ebee3fd0c413a34 SHA-1: 3e769fa68bf4b753de9a29d282ba8d5602a11447 SHA-256: 128863f384d39d007f7be27e80edfae0b6015447733317575d8d504bad685325
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is flagged by heuristics. The embedded URL likely serves as a lure to trick users into visiting a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to exploit user interaction, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/wix?keyword=%25D0%25BC%25D0%25B5%25D1%2582%25D0%25BE%25D0%25B4%25D0%25B8%25D1%2587%25D0%25BA%25D0%25B0+%25D0%25BF%25D0%25BE+%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B5%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B8%25D0%25BA%25D0%25B5+6+%25D0%25BA%25D0%25BB%25D0%25B0%25D1%2581%25D1%2581+%25D0%25B2%25D0%25B8%25D0%25BB%25D0%25B5
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f1ce2551df0d42a18309366895690d5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7c66bdfd47e45849508a83533fc6e57.pdf
    • https://static.usrfiles.com/ugd/ce5d00_d24c87663fcc4d16bfd628b6c8270f16.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/21546439870.pdf
    • https://static.usrfiles.com/ugd/b88e3d_872adf3ae0df404c9c1f518304dff915.pdf
    • https://static.usrfiles.com/ugd/88a84f_e86777da276744628a9a7a12c97cb52f.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/14737538679.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/73877881394.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e78.bin
5e85a86eec1c1ec6b54202c560f43d6480aa65494af590e1e150c16a56736aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E78 5620 bytes
font_01_sfnt_off00007136.bin
ec4ce98e20e149280175f5874c0f79b5583385da6c66e14a9760661f14191ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 13672 bytes

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