Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b60be853e4d7df9…

MALICIOUS

PDF

44.1 KB Authoring application: GIMP
MD5: bb58b756de5e71b224918c1ab2ec9fa5 SHA-1: a8018abc9b4851aeaf651efd53af6c1350ff05d8 SHA-256: 3b60be853e4d7df9ccf8644034fc811a675dc28a5716c765ab8fe86d80fe1ba4
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely used to distribute further malicious content or redirect users to phishing sites.

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 https://zunamifevaw.weebly.com/uploads/1/3/0/4/130477372/zukonebarumopaji.pdf
    • http://rusawaso.creamzdorow.ru/uploads/2020/01/27/03e9199f210181.pdf
    • http://michaeljcatering.com/uploads/1/3/0/2/130274316/2846142.pdf
    • http://bennyjmusic.com/uploads/1/3/0/5/130545434/2e500fb9.pdf
    • http://foj.vipiski-besplatno47.icu/uploads/2020/01/29/1250b.pdf
    • http://bersamaju.nl/uploads/1/3/0/4/130483320/88bfbd3e.pdf
    • http://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/6/130621190/130621190.html#informacion+de+los+trastornos+alimentarios+en+ingles

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001106.bin
ccf5584147c5921a802893061b29e245198c566f92728620b348e6df8de50572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1106 8868 bytes

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