Malicious PDF — malware analysis report

Static analysis result for SHA-256 025f4e3a924ec284…

MALICIOUS

PDF

40.4 KB Authoring application: Poppler-utils
MD5: dd2f56feddd9de722498f05ae1f61330 SHA-1: bfea63fa8234ea727073f77f52ec457b53f67520 SHA-256: 025f4e3a924ec28472df93131466db0b3184a0f05d472715946cd3b73bf4c279
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files hosted on various domains, a technique often used for SEO poisoning or to distribute malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and an ML classifier also flagged it as malicious. The embedded links are the primary indicators of malicious intent, suggesting a phishing or malware distribution campaign.

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://emilytiberio.com/uploads/1/3/0/6/130620695/4073461.pdf
    • http://nirthpanter.net/uploads/1/3/0/5/130540037/a7716628b.pdf
    • http://appea.com/uploads/1/3/0/2/130272890/marakowuvi_mivoxidile_bojarowoxunudug_zujupejowu.pdf
    • http://reedhospitalityassetmgt.com/uploads/1/3/0/2/130271229/pimux.pdf
    • http://amycashproperties.com/uploads/1/3/0/4/130476410/notakokaje.pdf
    • http://drfilldental.com.au/uploads/1/3/0/4/130435732/dotipivor.pdf
    • http://suncityprides.org/uploads/1/3/0/7/130739175/130739175.html#ejercicios+abdominales+hipopresivos+sentado
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001152.bin
5719a80d1c93acbfb83b402b279c906b2a6b5428beda9a77710764738406904d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152 9216 bytes
font_01_sfnt_off000057f1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F1 16036 bytes

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