Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fec2a537667154f…

MALICIOUS

PDF

59.7 KB Created: 2020-08-21 16:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 664b3dafa5effded3e6b0380faa59e1c SHA-1: 145d8a1f13bc5c6efcd32b398183a44001319d81 SHA-256: 8fec2a537667154f95f0be0da42ea627064ea507996872ddade0bc16b1c6838c
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded URL 'https://ttraff.cc/pify?keyword=discrete+wavelet+transform+in+image+processing+pdf' is a clear indicator of a redirection attempt. The document body, though heavily obfuscated, contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links suggests a SEO poisoning or link farm tactic to distribute the malicious payload.

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=discrete+wavelet+transform+in+image+processing+pdf
    • http://daniwame.timezone-cbd.com/uploads/1/3/1/8/131856271/mituvu-vuvesukozumovu-gijefexave.pdf
    • http://vifujo.maconretirementeasy.com/uploads/1/3/1/6/131607712/kusafozigoxuwadafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/16131122161.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/12722567033.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/99422217727.pdf
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/samorupuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/pewoxog.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/kosalojebemadidune.pdf
    • https://cdn.shopify.com/s/files/1/0445/7860/3167/files/postgresql_backup_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/applied_physics_for_engineers_by_neeraj_mehta_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b1a.bin
75a34ffe4829a8d75096c1593fef0a55fe6ef8d02ccf5a64791b345ee9903223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 5628 bytes
font_01_sfnt_off00009e3b.bin
e565559470e31427305f5398370910d7d260c2c42c2963f6775681dfb68effcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3B 14476 bytes
font_02_sfnt_off0000cc7c.bin
e7820fc51e823c9510b69cd30def3c6041c113b552710f50053ecd1ea592d451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 16224 bytes

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