Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1daf4919db70912…

MALICIOUS

PDF

37.6 KB Authoring application: Poppler-utils
MD5: 931e976c055fd1107c9875fcf84703d9 SHA-1: 57b47c2cc459f70821d28caba55dbc9ba68b4d7f SHA-256: c1daf4919db70912dadfd43029747ca3c2039e5e59e6ee6d127a6466226f23af
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent. The document body, though heavily obfuscated, contains URLs that are also listed in the extracted URLs. These URLs likely lead to further malicious content or phishing pages.

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://barebeautypdx.com/uploads/1/3/0/4/130488294/tizekezawibej.pdf
    • http://nationalarchivesphotographer.com/uploads/1/3/0/6/130621801/6558836.pdf
    • http://alwoc.org/uploads/1/3/0/7/130739204/fonowebimuboxarilel.pdf
    • http://mssarkisclass.com/uploads/1/3/0/3/130313426/bc657de.pdf
    • http://theheroinesclub.com/uploads/1/3/0/5/130544230/1049177.pdf
    • http://lashesbyalyssaabq.com/uploads/1/3/0/2/130271030/zizabalirote_gejuvimapopipuk.pdf
    • http://mindforyou.org/uploads/1/3/0/5/130543784/130543784.html#alcalose+respiratoria+compensa%C3%A7%C3%A3o

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b6.bin
7d2c93ce9d4cd870d9fb242cdb815d20db12124576f93d43d6138e1915affd09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6 10308 bytes
font_01_sfnt_off00005770.bin
122949f083a2ddc1f85aaf2dae179fae984b786e732e68f09857d8f50f334a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5770 2784 bytes

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