Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfb1f4a8109c0f7…

MALICIOUS

PDF

49.8 KB Created: 2020-08-05 04:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 780157cbfba771d67332e024a837f909 SHA-1: 56f95cc0d69628aab47e30f4b93659bace37be99 SHA-256: 8bfb1f4a8109c0f75e4576d6a0743fbdd3e7cbbf57df25561d0ffb8a264f3235
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and text 'anti bribery policy pdf', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The primary malicious IOC is the redirector URL.

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=anti+bribery+policy+pdf
    • http://files.innovativelearningservices.com/uploads/1/3/0/8/130814132/ladofameluv.pdf
    • http://files.whitenergroup.biz/uploads/1/3/1/3/131379277/8988f9c382e0.pdf
    • http://files.mindfulvisionaries.com/uploads/1/3/2/7/132740892/sopovofafikuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/vekuxatuvulivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/26091603328.pdf
    • https://cdn.shopify.com/s/files/1/0448/0276/9053/files/ian_sommerville_software_engineering_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/ponelogokujodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/vojufefodikejeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/tojovibew.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/anaphores_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/rapewenelazojetebazeleze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0430/7137/3466/files/hover_dynamic_dns.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/fepimiponanixiguserumifi.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_off000084d2.bin
90b14f971e1917d1d71cea62f218273d2326154d49199b799d504597cbc6755d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D2 4992 bytes
font_01_sfnt_off000095e4.bin
3490ffbe40ceb4eb57f0cc6d60779b5557ed686b18a820b4a67248d992e9049b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 10824 bytes

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