Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b001225dc5f93a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-15 16:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40a3c75540f6c8f1995cfaeca99ddc57 SHA-1: 3fd65fea6d68fb54c62bc2f98346a1512deabb89 SHA-256: c6b001225dc5f93ab23884cb4fffe154983397c113aa5cbb52b5879c395c1541
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, with a critical heuristic identifying it as a malicious redirector. The primary malicious link, 'https://ttraff.cc/pify?keyword=video+to+gif+app', is designed to redirect the user to potentially harmful content. The document body, though heavily obfuscated, contains references to URLs and the tool used for its creation, wkhtmltopdf.

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=video+to+gif+app
    • http://files.cnstrategies.net/uploads/1/3/1/4/131406717/didizinu-ferepubofajub-sobimopo.pdf
    • http://files.murliesmiraclegrowth.com/uploads/1/3/0/7/130776407/8191119.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/mathematical_induction_problems_solution.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/content_analysis_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5022/0185/files/vomosifage.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/53577484431.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/gepegipaliz.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/pigisidixeruloremeraf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0870/files/lexawupisowanovimato.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/zenawoxedunimesez.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_off00006095.bin
cb784097c85201a941997657c995a7376278d20d9fb78a41725f2461d798bcbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 4868 bytes
font_01_sfnt_off00007144.bin
14b884d400baed51ba34db24c050c4ae108a172c1dc7798c8deed087fe92e859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7144 10328 bytes

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