Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4347ece3814472f…

MALICIOUS

PDF

49.3 KB Authoring application: Adobe PDF Library 9.0
MD5: 2601778c4c014e66f9796f5e24ba50c5 SHA-1: 5a51233eb911400634bb883c80c7da4ffec45a70 SHA-256: c4347ece3814472f804fc5df895910f49bc2ff7c3b01a87c2deed3207f57c196
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical finding for a link farm and ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0. The embedded URLs point to a large number of external PDF files hosted on various domains, suggesting a coordinated effort to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://richbassviolin.com/uploads/1/3/0/7/130775835/bab7928883ee.pdf
    • http://triptexts.com/uploads/1/3/0/4/130475955/e06e78c.pdf
    • http://nightowlsoulclubs.com/uploads/1/3/0/5/130545199/sukebujiwarezemix.pdf
    • http://thinkhappyvibehappy.com/uploads/1/3/0/5/130538869/xutigu_tobis_gewogaranijuz_zekog.pdf
    • http://mydigibong.com/uploads/1/3/0/6/130603890/f6f4c5aa4a84c.pdf
    • http://damorse.com/uploads/1/3/0/4/130436209/vonegelagupa.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/4/130435738/130435738.html#convert+hexadecimal+to+ascii+excel

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001392.bin
222118257a93e8e01b5b5a850df51848e0d92f076eeee2cf2c8b1322342bc39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1392 10356 bytes
font_01_sfnt_off000071e1.bin
d0f300606821d87a0e6cc5a10b8e853f8bd62273688a4db708b7fdb82de6bfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E1 16084 bytes
font_02_sfnt_off00008635.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8635 2604 bytes

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