Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7b98d5a466197d…

MALICIOUS

PDF

126.6 KB Authoring application: Adobe PDF Library 9.0
MD5: 24caedb45d93b5cc0e0b9d7e59907274 SHA-1: 01ff78e4df24b92c9c9e6295351bc9e42d940694 SHA-256: cc7b98d5a466197da5525970f9b2bc37841fd5801b96481bef6d0e5be92ce433
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall-7605656-0. The document body, though heavily obfuscated, contains references to drawing realistic faces and includes the primary malicious URL, suggesting a lure to potentially malicious content hosted externally.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://cleanedbychris.com/uploads/1/3/0/4/130489386/jisogozeto-kumezimag.pdf
    • https://muxitibo.weebly.com/uploads/1/3/0/2/130289482/duvupebajoguv-bovor-xezeniwaxolivi.pdf
    • http://halogroupinc.com/uploads/1/3/0/2/130288642/690e7119bfb7a.pdf
    • http://jas.event-essence.com/uploads/2020/01/28/xitorilovu.pdf
    • http://jerseypoolservices.com/uploads/1/3/0/2/130288307/2429925.pdf
    • https://bawefomubaduver.weebly.com/uploads/1/3/0/4/130483842/c0857031479.pdf
    • http://ilanaleberdesignfolio.com/uploads/1/3/0/6/130604589/sipeparomewik-bevexoxinazunu-vokazejurezekop.pdf
    • http://asaa-time.com/uploads/1/3/0/5/130543133/8969794.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/5/130588445/130588445.html#secrets+to+drawing+realistic+faces

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013d1.bin
0f377de40daa2018f8979371f5857808be270c6a6292bccc336c6aa05bb9012e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1 10532 bytes
font_01_sfnt_off00008170.bin
8384874bf6e04da36201af47b2c12f50b64d75e7a50fd02fafb92d74f2a389a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 16624 bytes

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