Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f6be28bbd67a75…

MALICIOUS

PDF

40.6 KB Authoring application: OpenOffice.org
MD5: bd101a0ae964e7c97df648c9c40fa94d SHA-1: df2cb02f8c920aa50b57b4dc94c58dc1c295294d SHA-256: a8f6be28bbd67a75c3faafca4249703298c9e82e8fb2ae302bd3dbfc72944d09
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO link farms or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The primary URLs identified are likely part of this link farm or distribution network.

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://hannahhaleymakeup.com/uploads/1/3/0/7/130740412/79c0ff05a02b.pdf
    • https://diruveses.weebly.com/uploads/1/3/0/5/130543065/5e136d3fe5d41.pdf
    • http://texasfinesse.com/uploads/1/3/0/4/130483277/5653246.pdf
    • http://alextindall.net/uploads/1/3/0/3/130313345/2941179.pdf
    • https://jomezaxu.weebly.com/uploads/1/3/0/4/130490681/6138181.pdf
    • http://pleaseexcusetheshirt.com/uploads/1/3/0/2/130289346/7375015.pdf
    • http://lambiparitips.com/uploads/1/3/0/4/130435574/vivegogijo.pdf
    • http://bwmin.org/uploads/1/3/0/6/130639363/vanazaj_pujunofet_wosatatulipudi_vutofiset.pdf
    • http://oakclass.com/uploads/1/3/0/7/130776180/130776180.html#wabco+automated+manual+transmission

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fc.bin
235033764ee3ce8da2294ec90ac519340204702aca0b4821c651996825767650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC 9104 bytes
font_01_sfnt_off00005874.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5874 16036 bytes

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