Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92ed490ef925b2d…

MALICIOUS

PDF

34.4 KB Authoring application: QPDF
MD5: 01742b98df82fda76636c8e076037b69 SHA-1: fba312bf48059af71f3679242c194202744ee6e0 SHA-256: b92ed490ef925b2d7ad83aeccc8135059f5832f8238283ab1acc04349d3d8bcd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a significant number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body content is heavily obfuscated and does not provide clear user-facing text, but the heuristic firings are sufficient to determine the attack pattern.

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://nooracademyonline.com/uploads/1/3/0/8/130874240/d15cc6cd54af.pdf
    • http://mirroryourbrilliance.com/uploads/1/3/0/5/130547846/44b2dee8ec7b7fc.pdf
    • http://orangefishmedia.com/uploads/1/3/0/4/130490193/sopesuxiwuk.pdf
    • http://newwebtest.com/uploads/1/3/0/7/130776133/3072085.pdf
    • http://bremenfamilymartialarts.com/uploads/1/3/0/3/130379216/tikut_mugadugipik_naxekumudid.pdf
    • http://monthlyphysicalchallenge.com/uploads/1/3/0/5/130590111/soforijemasa.pdf
    • http://mrmozsi.com/uploads/1/3/0/9/130969229/4394b1db102.pdf
    • http://theoldshipaground.blog/uploads/1/3/0/6/130604710/7687994.pdf
    • http://www.trustedfinancialpro.com/uploads/1/3/0/3/130379517/raduzesafapila.pdf
    • http://mail.simplesoapsbyjande.com/uploads/1/3/0/6/130604564/b6eb8d030674.pdf
    • http://swmyarn.com/uploads/1/3/0/2/130270855/1502040.pdf
    • http://mylevelbest.org/uploads/1/3/0/7/130775127/bewupafutudowub.pdf
    • http://webdisk.bardosdiamondsports.com/uploads/1/3/0/8/130874192/130874192.html#find+absolute+humidity+psychrometric+chart

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb3.bin
053fdba218e9b37985cdbc237453001d26001ddac7bd12ec6c9f6f3c9705d634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 7940 bytes

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