Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee77d7c3a5718b74…

MALICIOUS

PDF

51.2 KB Created: 2020-08-12 16:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f994acaad3f8d2ac58a04dbebd35cc2 SHA-1: a0b8532c6775163c7c922d0bab98acb6cdc8b583 SHA-256: ee77d7c3a5718b7432901076ced8db28d6cb85ab0ef0111c6c7c1c9f82fdf8ed
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used in conjunction with the document's apparent lure of 'healthy recipes'. The document body, though heavily corrupted, contains fragments of the target URL and mentions 'wkhtmltopdf', suggesting it was generated by a tool. The primary malicious IOC is the redirector URL, which likely leads to further 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=receitas+alimenta%25C3%25A7%25C3%25A3o+saudavel+pdf
    • http://sumirad.tccollegecoaches.com/uploads/1/3/1/3/131379803/6bc02.pdf
    • http://zoxokoju.rusticedenphotos.com/uploads/1/3/1/4/131407995/1feb70.pdf
    • http://files.orielesteiner.com/uploads/1/3/1/4/131438418/19ca17a305b.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/wavupimifuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4344/files/futetuzizemuzibujib.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/fojavelidibogorak.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/relekaleg.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/61186580172.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/mathematics_for_finance_business_and_economics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/75456630350.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/xadaranovotekelurizalibod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/73543505170.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/navy_seals_training_guide_mental_toughness.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/bulum.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/8509302142.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_off0000772e.bin
f5d677b2d32004c201f470e3e6a873dccc6b2def46f9859af3236d39f0c07a53
pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 5656 bytes
font_01_sfnt_off0000897f.bin
19bcc0163683864a8033902cd461cf6ff2a462c157a6efa2e33bf343b6b91674
pdf-font-stream PDF embedded font (sfnt) at offset 0x897F 12576 bytes
font_02_sfnt_off0000af9b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9B 4324 bytes