Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf08fc921bb70517…

MALICIOUS

PDF

53.4 KB Created: 2020-08-16 19:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ef1433c54f36eb631a06e0a77eef726 SHA-1: cd04f8592ba99ed356da808c195116cd77825468 SHA-256: bf08fc921bb705179324e52ee38335ee3d55ecc4183185a14d446962c340a170
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF title, suggesting a lure. The primary intent appears to be redirecting the user to malicious infrastructure.

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.ru/pify?keyword=ensayo+alcoholismo+en+los+jovenes+pdf
    • http://files.shannon-nightingale.com/uploads/1/3/0/7/130776601/1122682.pdf
    • http://files.enfin-cottage.com/uploads/1/3/1/8/131872178/8163230.pdf
    • http://xobapub.rustywoods.com/uploads/1/3/1/6/131636725/3229957.pdf
    • http://files.manuscriptcritiqueservices.com/uploads/1/3/0/8/130874370/gowilug.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/descriptive_analysis_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6802/files/minecraft_decocraft_mods.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/class_10_acids_bases_and_salts_notes.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/sexual_vs_asexual_reproduction_worksheet_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/rujuzilawataxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/82269126061.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/pokix.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5058/files/3810433517.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/multiple_regression_and_correlation.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/5230572842.pdf
    • https://cdn.shopify.com/s/files/1/0433/8031/0174/files/zijuwigejeputamubujumudir.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_off00008ff8.bin
5bb6797a7130a191b175bb896a17cd1901a07d489c0db427d3fb63f928a4f5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF8 5496 bytes
font_01_sfnt_off0000a295.bin
3d7146f9278d0f1355f99c61a9eb5aae3535507a91de710955369d626e57f61a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA295 11104 bytes

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