Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20fa4120ab30986…

MALICIOUS

PDF

41.2 KB Created: 2020-08-17 14:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52132eb55f12b93cb0ff761b320fab5 SHA-1: 932079dcef59c1df1d70def2829694ff11e18450 SHA-256: e20fa4120ab3098692228c8bef64bf89d4f79218945b5582e85ed401d70dcd96
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=cowboy+bebop+music+sheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the PDF.

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.ru/pify?keyword=cowboy+bebop+music+sheet
    • http://files.lgbadgeryouthfootball.com/uploads/1/3/1/3/131398555/rifenirilomegat_wafutolivewub.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/2573435506.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/gitewawujurigujisuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/sufosugaviruxogovetukopib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botolewapaniwid.pdf
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/cheesecake_factory_bread_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/bixobapuxuxolamodarezax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/14025394585.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/australia_passport_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/aprenda_a_desenhar_pessoas_guia_completo.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_off0000468b.bin
66dd4244ad2f10b0ffb10598fd89bf79ec04c1c8148e6b701bb33599342e6dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x468B 5072 bytes
font_01_sfnt_off000057c3.bin
298c82a45ab6b8c4c1580d4d067e8da1299bdca56a4dc4a28e2f1b663d8ede2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C3 21460 bytes

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