Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d3b94249497dc8…

MALICIOUS

PDF

34.2 KB Authoring application: Poppler-utils
MD5: 8776ac072b24e76ea63c431413cb5baa SHA-1: 7a019a88d061661ee2c714754647ed94b2d01bf8 SHA-256: d9d3b94249497dc8900e0d0d7a0f7e2ab0031fbabcce5c746a616e7b6cfa5d04
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, many pointing to other PDF files hosted on various domains, which is indicative of a link farm used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. The document body mentions 'Connotation and denotation worksheets 8th grade', suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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://tivipogux.weebly.com/uploads/1/3/0/5/130544413/nuzisoju.pdf
    • http://offthepier.net/uploads/1/3/0/5/130589133/munofufe.pdf
    • http://likenewelectronic.com/uploads/1/3/0/6/130621673/9453629.pdf
    • http://route66caps.com/uploads/1/3/0/5/130589214/bejerakeg.pdf
    • http://registrationdogpapers.com/uploads/1/3/0/5/130547999/zuvedidumalu_vamobemamopina_totopebeku.pdf
    • http://daradias.com/uploads/1/3/0/2/130289589/4059f.pdf
    • http://brittanygiametta.com/uploads/1/3/0/6/130604735/130604735.html#connotation+and+denotation+worksheets+8th+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001122.bin
ff51cfa8e7914abb3e015d5c162f8f181a4881cec5f87a56e1ce0308008673b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1122 8608 bytes

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