Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3613765c9eba186…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 15:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c2fa8344c0a97a23619f90f1ae77b8 SHA-1: bb3601c92b7ce1965275294c0054e82e49e34b18 SHA-256: b3613765c9eba1866c091c61c73108757b7d6e84c2d8fb77d39e28962e1a144e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a seemingly unrelated phrase about school uniforms, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely to improve search engine ranking for malicious content.

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.com/pify?keyword=malmesbury+park+school+uniform
    • http://files.chanticleer-press.com/uploads/1/3/0/7/130775286/libowagutuk.pdf
    • http://files.bostondigitalproductions.com/uploads/1/3/0/7/130739789/kufuxorimi_tanubabovolus.pdf
    • http://files.mhdtechnologycorp.com/uploads/1/3/1/3/131384635/safawedusut-jewiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/98997374480.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/bel_ami_guy_de_maupassant_francais.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/devenir_2018_year_end_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/characteristics_of_c_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0438/0609/7570/files/advanced_excel_functions_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/for_loop_in_ruby.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/avancemos_3_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/matlab_fourier_transform.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/dowonava.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6726/files/74169359870.pdf
    • https://cdn.shopify.com/s/files/1/0433/8011/3562/files/succeed_in_cae_10_practice_tests_key.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_off00005b74.bin
58eb12b9bfd9b863999f99ace02927b25b6e736d9b5cc9250053f30bfb4639b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 5568 bytes
font_01_sfnt_off00006e44.bin
dd89b9d43ffeeabf238d31cf1af646cc67854d830bceb570b50aa1476cffc2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 10272 bytes

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