Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deed69a15a64f48…

MALICIOUS

PDF

73.8 KB Authoring application: Karbon
MD5: 91b4c6974670263fa994564170dd060a SHA-1: b22c3244111f549649ec56cbb00b2739f43b1d7d SHA-256: 1deed69a15a64f48061de119aa4c3d828cb978f5cb1fc08106a8b14d1f7a621f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external domains. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. The primary malicious URL identified is http://kefa.statbrutedebutel.com/uploads/2020/01/29/tidoga.pdf. The document body, though heavily obfuscated, contains numerous URLs, reinforcing the link farm attack pattern.

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://kefa.statbrutedebowl.com/uploads/2020/01/29/tidoga.pdf
    • https://bezirilesezozu.weebly.com/uploads/1/3/0/3/130324037/nupako.pdf
    • https://bijivefo.weebly.com/uploads/1/3/0/2/130270779/9967438.pdf
    • https://nazedubuzolefu.weebly.com/uploads/1/3/0/3/130379589/2902421.pdf
    • http://amandawoodshall.com/uploads/1/3/0/4/130489143/1039504.pdf
    • http://rednews.am/uploads/2020/01/29/wekokidajo.pdf
    • http://1551nbr.com/uploads/1/3/0/3/130323962/25561a.pdf
    • http://yoanstudio.com/uploads/1/3/0/4/130488584/9a15dbbf.pdf
    • http://vatimivaxi.support-account.net/uploads/2020/01/28/vomikozitezu-xivuvaxulip-piwosujabuwuk-xitujeviru.pdf
    • http://bethelips.com/uploads/1/3/0/3/130312969/sozajadere.pdf
    • http://lbsteam.com/uploads/2020/01/27/4392343.pdf
    • http://03stroy.ru/uploads/2020/01/27/f0b49c7dd21217.pdf
    • http://bodyworkbybarb.com/uploads/1/3/0/6/130639933/7541676.pdf
    • http://malakut911.com/uploads/2020/01/28/419a6041b516a6.pdf
    • http://myemilyknight.org/uploads/1/3/0/5/130590416/c46fb.pdf
    • http://gikomefuxi.galiciamotor.net/uploads/2020/01/28/fenewerelomosav.pdf
    • http://ter.cinemacritico.online/uploads/2020/01/29/widaver.pdf
    • http://taideinto.com/uploads/1/3/0/2/130272233/60b26e4b812ee6.pdf
    • http://uintahonlinek8.com/uploads/1/3/0/4/130488631/130488631.html#horace+silver+senor+blues+sheet+music

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015dc.bin
50f27c2502c932f85bd222f1f4ee0dc64a83fb3e14ecb8e90cc8671f5cb6aa26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC 9188 bytes
font_01_sfnt_off0000db8b.bin
dfe569938dd590b4f986412dc334a56f678591a913e1a32018ea8c90da4ae272		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 16100 bytes

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