Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bca4d6edde513df…

MALICIOUS

PDF

40.3 KB Created: 2020-09-09 10:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b864542e6da588c6cfe305eb34de85b SHA-1: 39d659e8d7d1ce152d3b5fd05d17b49cbfd3ce2c SHA-256: 4bca4d6edde513dfa6118db25247026dbe404a190131bcc08cf0f81988dfb5d6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a redirector service, which is a common technique for distributing malware or leading users to phishing sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags this behavior. The document body, though heavily obfuscated, contains text related to "Canada visa lottery portal form" and the malicious URL, suggesting a lure for fraudulent activities. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the malicious intent.

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.link/wix?keyword=canada+visa+lottery+portal+form
    • https://static.usrfiles.com/ugd/2f3ac6_c0e84ff12003434da9cd8ab40472bf83.pdf
    • https://static.usrfiles.com/ugd/80bfa9_cef4e21d168a4a6aa05e8681f932aa34.pdf
    • https://static.usrfiles.com/ugd/96bf9d_9168c836704f4c6d8fa55842b85bb6d0.pdf
    • https://static.usrfiles.com/ugd/b50c55_82eef443867a41d99aa1a014dd00cf0c.pdf
    • https://cdn.shopify.com/s/files/1/0469/0477/0720/files/xadixixutuwofalomenode.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/spotify_premium_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0438/2497/1936/files/41964322546.pdf
    • https://cdn.shopify.com/s/files/1/0462/8542/2752/files/cyberghost_vpn_android_box.pdf
    • https://static.usrfiles.com/ugd/f0b6b3_cce6ab1205a74175be919016870e0723.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_b3d70ec0e2ed432893c780b1cdf64585.pdf
    • https://static.usrfiles.com/ugd/5dc3ca_5eeef263421c439e81e889158f9df87d.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_off0000604c.bin
441d004e50a445d357ca2e936342b0dcb427f1864456cd8042d30bfcebefc636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 5252 bytes
font_01_sfnt_off00007223.bin
bded93ca556c2db09ca4512ecb348486f3eb1cf71f83bb6d6b18274347cd4e3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 10120 bytes

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