Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa7db6b0ad72e9f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-12 07:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4264494e0bcc8828eead01d73118bfa9 SHA-1: 4617ba2af83204d8eef17f7b6059b44f5d792173 SHA-256: 7fa7db6b0ad72e9f424b14c06c4c98338bd971cc50fb84bebcf4a1521f7c7df5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=comment%20fusionner%20deux%20pdf%20windows'. The document body, though heavily obfuscated, also contains this URL and other embedded URLs, suggesting a lure to external malicious content. The presence of a large number of external PDF links, many with numeric slugs, indicates a link farm SEO tactic, 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/wb?keyword=comment%20fusionner%20deux%20pdf%20windows
    • http://files.batterypowered.co.uk/uploads/1/3/0/8/130874668/6631c2872f3.pdf
    • http://nevul.saigonapartmentcenter.com/uploads/1/3/1/6/131637881/1046749.pdf
    • http://files.strandberg-marine.com/uploads/1/3/2/7/132740463/gofan.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/lapejepupudizuwiboguboliv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/woodworking_plans.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/narutukagavokuxefelutoze.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/empirical_methods_in_finance.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/dazale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/59849678418.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/31216740242.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/relus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/38372793195.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/9563755646.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/54561927873.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/codenames_board_game.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_off0000670c.bin
6317478468f28a70052d44ec2c39fa8c6eb0f5ee3f5dd135371faf2e0f9107f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 5008 bytes
font_01_sfnt_off00007810.bin
c87c6bc9a4da96257ce626b18efdbdb90467c0beee55dd1e676a890cbe120391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7810 11428 bytes

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