Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac14fc8f17ad3dc0…

MALICIOUS

PDF

38.4 KB Authoring application: pdf-parser
MD5: 939e9293c13d2e2f41a4bb1d5551c348 SHA-1: efa521f6a2127137cf95250e6e6d6d1312f11177 SHA-256: ac14fc8f17ad3dc08f712931f8e63e9773e1c755436259dc7f85f887bac0503e
120 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 hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This technique is commonly used to distribute phishing content or redirect users to malicious websites. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent.

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://mercadohuanacaxtle.com/uploads/1/3/0/2/130273735/4331981.pdf
    • http://backtobal.com/uploads/1/3/0/2/130287939/3350792.pdf
    • http://jiwekop.fcshield.com/uploads/2020/01/28/gemoriwilidawis-fukosak-lumoledodadab.pdf
    • http://goti.mover-oy.icu/uploads/2020/01/28/7667698.pdf
    • http://zimo.evergy.ru/uploads/2020/01/28/9a726.pdf
    • http://seleneskincare.com/uploads/1/3/0/2/130291702/6116865.pdf
    • http://kylaconner.com/uploads/1/3/0/4/130436163/130436163.html#adding+and+subtracting+fractions+word+problem+worksheets

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010bf.bin
871e328db9c732512362f4a0d9a82b9b8280ee132cf450f2aa2f0df373a4ae56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF 7912 bytes
font_01_sfnt_off00004eea.bin
669a22844ddb84b64a1d93eb6147c2b8b7ca76f4316fe4be2bbf69c96252e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEA 16180 bytes

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