Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed87c0088070099…

MALICIOUS

PDF

36.4 KB Authoring application: QPDF
MD5: 9bb0f60574e78c6ecba467336dba6ffd SHA-1: a106ba7921598f84d6f3cc41803caf875151b449 SHA-256: 4ed87c0088070099c0c91f8d7b68aab04f805f7b4bac6cd2ce9a0ba804c66c50
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and exhibits a critical heuristic for a 'PDF_SEO_LINK_FARM'. This indicates the document's primary purpose is to host a large number of external links, likely leading to phishing sites or malware downloads. The ML classifier also strongly supported a malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://muttsociety.com/uploads/1/3/0/7/130776520/bd52a277b5d.pdf
    • http://www.theirbigstory.net/uploads/1/3/0/2/130287873/b0706634726a7e.pdf
    • http://boyde-studios.com/uploads/1/3/0/6/130605115/vaxivezikogi_sakoxopewuv_golomapufe.pdf
    • http://chiefconsultinggroup.com/uploads/1/3/0/8/130873932/4fc4a326ed.pdf
    • http://carolinawhitetails.com/uploads/1/3/0/6/130621163/kopugawefofivo_buvisiwatefu_boregugikuke_tugalose.pdf
    • http://ptwellsvillage.org/uploads/1/3/0/7/130739824/47a0a73b6a162.pdf
    • http://www.timbeyers.net/uploads/1/3/0/7/130740054/6981668.pdf
    • http://prevenseskincare.com/uploads/1/3/0/7/130739007/2609580.pdf
    • http://mobilebeatzofcolorado.com/uploads/1/3/0/8/130814187/2087438.pdf
    • http://ponomedicine.com/uploads/1/3/0/4/130483285/vajewoxazoxav.pdf
    • http://donandphil.com/uploads/1/3/0/5/130538941/zunegareke-jowisi.pdf
    • http://bmajorevents.net/uploads/1/3/1/0/131070447/131070447.html#arduino+bluetooth+ile+servo+motor+kontrol
    • http://carolinawhitetails.com/uploads/1/3/0/6/130621163/kopugawef

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000329f.bin
13cbbe450159ed9e4fd30f9e4ecb4b9f357fc30f1ffb92df219e0ef1443ca90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x329F 10120 bytes

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