Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf96b3321303556a…

MALICIOUS

PDF

34.2 KB Authoring application: Karbon
MD5: 61b241d9925036471247464f3eb582d5 SHA-1: c1b31a3a47668eb91052cf7c569d6849983663f8 SHA-256: cf96b3321303556a8b2d7f0f6924abf228f14307ab36c938db4ec766e8912c12
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags this as Pdf.Phishing.TtraffRobotInstall. The document body, though corrupted, contains references to these URLs, suggesting a phishing or malicious content distribution scheme. The presence of a 'download' lure further supports this. No scripts were extracted from this sample.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nikhitavaddineni.com/uploads/1/3/0/4/130435846/cfc8c4ab944.pdf
    • http://myriuwedding.com/uploads/1/3/0/5/130538869/mopedimuvojomisorenu.pdf
    • http://fisterrastudio.com/uploads/1/3/0/5/130590279/pumufaludezurotixiku.pdf
    • http://nabajal.org/uploads/1/3/0/5/130588843/dabasi.pdf
    • http://xeje.arthameleon.com/uploads/2020/01/29/kutegi.pdf
    • https://tadixuvoluta.weebly.com/uploads/1/3/0/4/130476410/7632d47b4504.pdf
    • http://plussizebridaldressesnh.com/uploads/1/3/0/6/130639892/37cf89.pdf
    • http://5pointauto.com/uploads/1/3/0/6/130605222/130605222.html#carnatic+music+for+beginners+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001110.bin
02d4c59adfa926106fc0e1317f9e151c4ef432581109e264ef6bd61c6ce3361f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1110 7812 bytes

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