Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d38200227652e61…

MALICIOUS

PDF

46.5 KB Created: 2020-08-02 05:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ea279ec760b83433e865ee4fb90b75b SHA-1: ff98d0eda00a1e1879a5db1f22c04990b573f7b4 SHA-256: 6d38200227652e61f6f62b0d39cc3ed539b3f2c95d686cdf88df165ca5c316c2
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to a 'national holiday calendar 2016'. The presence of a large number of PDF links, many pointing to Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=national+holiday+calendar+2016
    • http://files.countryliberal.org/uploads/1/3/0/7/130739201/4658338.pdf
    • http://files.stephendoughtonfoundation.org/uploads/1/3/1/4/131406841/4756f72b16.pdf
    • http://files.thecharestlab.org/uploads/1/3/1/3/131381374/xatetoko-warigeriraridiv.pdf
    • http://files.smuapolitical.org/uploads/1/3/1/4/131407423/8780696.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/61115776721.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/92338140111.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/togitojabikakijepexotavu.pdf
    • https://cdn.shopify.com/s/files/1/0449/6493/7896/files/tv_azteca_m3u.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5214/files/wefudomenotusunane.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/60617540236.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/73527484828.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/vuvutewawuzatejefaxigojab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/4407746560.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/1416731191.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/wudemufesafew.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/didajesegul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006871.bin
abbc4adc2a3d80c6d98e853c2874ecbf55a8df43b0da09b692239e1696475278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6871 5188 bytes
font_01_sfnt_off00007a06.bin
d881f4c26422d4f82f0a9b83c95099f4ac03bc124a4b6a4fd89f9607152b8c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 10844 bytes
font_02_sfnt_off00009f21.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F21 4324 bytes

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