Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5bf859c80706b13…

MALICIOUS

PDF

42.2 KB Authoring application: Poppler-utils
MD5: 5c93e48bf1287365c8934129b0126dd7 SHA-1: 0315bdffdd9772966933eec1fefb1e9cdfa4a6fa SHA-256: c5bf859c80706b1315515364a6fd85f1622fba0cb7888f5bf3f5b2692a89e406
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on unrelated domains, suggesting a link farm or redirection mechanism. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or malicious redirection intent. The document body contains fragmented text related to medical conditions, possibly as a lure.

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://corpsaccess.org/uploads/1/3/0/2/130288431/mekuwibuvefozezater.pdf
    • http://myescondidosoccer.com/uploads/1/3/0/4/130488500/f17625c.pdf
    • http://arkcityepiscopal.com/uploads/1/3/0/5/130544072/tixojimixogager.pdf
    • http://dancefitdanceacademy.com.au/uploads/1/3/0/6/130620372/tasogorisifo_bipobut_pufifejijanat.pdf
    • http://maleskincareblog.com/uploads/1/3/0/6/130604395/8203653.pdf
    • http://sdkuykendall.com/uploads/1/3/0/6/130604575/2433408.pdf
    • http://russlazaruk.com/uploads/1/3/0/5/130540010/a778b68b345cf88.pdf
    • http://adoptme.info/uploads/1/3/0/4/130483215/130483215.html#patellar+tendonitis+treatment

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112e.bin
91c6ed70ba73aa70ee57946a5d8a668c0f6fdec38278734682e9fa5789ab1181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E 7988 bytes

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