Malicious PDF — malware analysis report

Static analysis result for SHA-256 40df141b36fd31c1…

MALICIOUS

PDF

44.3 KB Created: 2020-08-23 09:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9abf665e9f176413685f3b923d8f4e7c SHA-1: 7193a5e8e02efc1949e009c1804611759e0d90c8 SHA-256: 40df141b36fd31c12b2cdbaf653e2eef35ae123a38b7f81c23222c73efa32617
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. One of the primary links directs to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of the link farm. The presence of a large number of external PDF links suggests a link farm or redirection strategy to distribute 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=adjectif+possessif+et+demonstratif+exercice+pdf
    • http://mozorure.coloradolawnservicellc.com/uploads/1/3/1/6/131607254/kelapil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/musenukazixaravasomelur.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/8690179619.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/91055270435.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/34021806166.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/mubadazefibogix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/signals_and_systems_roberts.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/jirezazebatasujirodam.pdf
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/championship_manager_17_apk_ios.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/dovugowokelitu.pdf
    • https://cdn.shopify.com/s/files/1/0446/9968/0922/files/82425253374.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_off00005d3c.bin
88c67dce04cd0cfd68a9fd304fbb3ba9bdde032d05c204b6a9e03102b1d0a5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 5404 bytes
font_01_sfnt_off00006f86.bin
fdbf3a6dad5e41dea574e227c1a3345057c2cba5ad5c999eb56868f46bf4b6e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 17276 bytes

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