Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b55da9b3e9c4553…

MALICIOUS

PDF

33.9 KB Created: 2020-08-16 16:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 040d8c0e2e16764f0e76019a26ceaa7c SHA-1: bc2465742377475694f1335b0e6a7ed3ec5c41b8 SHA-256: 9b55da9b3e9c45535a18b4bb7d55809abb3ddf0874e1c69840a5521ce89b7069
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a contract of employment template, aiming to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious content.

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/pify?keyword=contract+of+employment+template+mauritius
    • http://files.delightthyself.com/uploads/1/3/2/6/132681033/967fb.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/30749445861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/14663479118.pdf
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/mebolijiper.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/9811751340.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/neil_degrasse_tyson_astrophysics_in_a_hurry.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/mufebobek.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/20482043818.pdf
    • https://cdn.shopify.com/s/files/1/0449/6493/7896/files/anhydrous_ammonia_safety.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/exploring_creation_with_physical_science_student_notebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/dedicatorias_y_agradecimientos_para_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9631/files/34283476343.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_off000047c1.bin
25582044d133da4c10787c796dcfaa9dab288a61fab731adad42684b768a8748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C1 5168 bytes
font_01_sfnt_off00005945.bin
2871f28ae6981fd7a64f364e8d33dc81f817060056a906d3315d9b2018826dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5945 9780 bytes

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