Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cac3d152413f8e…

MALICIOUS

PDF

68.5 KB Created: 2020-08-20 20:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78653bb4ff066245bcba488270f7b33a SHA-1: 10ef232d043daa398e1877c67298bd40d0ee291a SHA-256: a9cac3d152413f8e2b74bc83c008b38fddaf1bef1f28c6c7e4a0af6de872bcb0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a significant number of external links, a technique often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=aeroelasticity+raymond+pdf', is flagged as a known malicious redirector. While no scripts were extracted, the heuristic firings strongly suggest a phishing or redirection attack pattern. The presence of numerous Shopify links, some flagged as benign, may be an attempt to blend in with legitimate 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=aeroelasticity+raymond+pdf
    • http://biroxovu.leeplazashopping.com/uploads/1/3/2/7/132712323/f8b4ecd41f.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/xitomusinidelikib.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/pawoduxog.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/7093681136.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/tawatoxalekimamejunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/warhammer_40k_ultramarines_transfer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/22368764153.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugasodaliza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4925/files/sufewaken.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/alliance_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/39163175472.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/test_wszystkie_czasy_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0430/4198/0567/files/61971490367.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/74138_decoder_datasheet.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_off0000d038.bin
25d2c0cec814b0f248f3d3e68f0c4183256fcfcf570caf92b5211c730558c5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD038 5392 bytes
font_01_sfnt_off0000e27a.bin
90f3219c950a581de74d8c606a3be52e4977aa4327569fe547c131986604b25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 10248 bytes

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