Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a743fed82dfbd71…

MALICIOUS

PDF

36.4 KB Authoring application: Nitro PDF
MD5: 3a073637f3ac2233b19855c798211e06 SHA-1: 0b1bca9f9342b24d5aef5f26e39cc08e3666ba5a SHA-256: 0a743fed82dfbd712335e837902923bb4e9ef42bc6b94b9b082c7f85b63e2dd2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs suggest a phishing or SEO spam campaign, aiming to redirect users to potentially malicious content hosted on numerous domains.

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://mindset40.com/uploads/1/3/0/6/130605307/jaxiguga.pdf
    • http://mykbzkitchen.com/uploads/1/3/0/6/130639764/menikevumad_vojawaz.pdf
    • http://mrsarmstrong.org/uploads/1/3/0/7/130776016/b02990619.pdf
    • http://chimneycarepros.mobi/uploads/1/3/0/6/130620619/2754290.pdf
    • http://coilcareonline.com/uploads/1/3/0/4/130488181/rafesusejore.pdf
    • http://mickpolich.com/uploads/1/3/0/9/130969565/feferi-xuxag-tovisaxogit-sekidezuw.pdf
    • http://giehs.org/uploads/1/3/0/7/130738715/janiz-xujukanefus.pdf
    • http://betteryet.net/uploads/1/3/0/6/130604749/0426cd42ccecd.pdf
    • http://blubloggs.com/uploads/1/3/0/5/130541272/3726801.pdf
    • http://thesteaklab.com/uploads/1/3/0/5/130590363/girawejijagowe.pdf
    • http://ooredooalgeria.net/uploads/1/3/0/5/130590596/abc101.pdf
    • http://www.mypersonalvest.com/uploads/1/3/0/2/130271177/mujaduwikot.pdf
    • http://dualphone.net/uploads/1/3/0/5/130539255/315561.pdf
    • http://0fyq5.bpmtc.com/uploads/1/3/0/8/130814124/130814124.html#ssc+stenographer+grade-c+and+grade-d+exam-2010+solved+paper

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034f5.bin
4a44ed2cfaac59d471976ec830a13d16135e7ea53c1d3c45caf7196bf4bc9a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34F5 8044 bytes

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