Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedc075f47fc740f…

MALICIOUS

PDF

49.2 KB Created: 2020-08-21 00:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff3a0bd40d0626da1ffae8367369d25 SHA-1: 8d5ba40a634bfe5aac656268b73e933fe5f97ac7 SHA-256: cedc075f47fc740fb03a963851f44abcce8da8ac48f69d652083ff485321b440
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL is https://ttraff.cc/pify?keyword=ncert+ka+full+form+in+english, which likely leads to a malicious site. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ncert+ka+full+form+in+english
    • http://files.bestoftimeswatch.com/uploads/1/3/1/4/131406498/netegupeximib.pdf
    • http://jovub.nea-salina.org/uploads/1/3/0/7/130776088/2b401f4ea.pdf
    • http://kilal.massagerevelstokeayla.com/uploads/1/3/1/4/131453109/4880814.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/37453663773.pdf
    • https://cdn.shopify.com/s/files/1/0434/4096/3750/files/vakupoxakolax.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/kavezidugigasarotu.pdf
    • https://cdn.shopify.com/s/files/1/0445/3587/3700/files/abertura_de_empresa_sebrae.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/nsdl_cra_s5_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/prime_time_math_book_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/market_analysis_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/susotejawif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/35935724823.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_off00008154.bin
b204517f327d03af882a761f9d0f8e042b8c0277009c4e66ca09bf0e49a0c112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 5328 bytes
font_01_sfnt_off0000934c.bin
263b2153753eec69ab55df725f70cb58f524eb90530e5abf9d101b89c190fbfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934C 10772 bytes

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