Malicious PDF — malware analysis report

Static analysis result for SHA-256 0919ae96cc3a13a8…

MALICIOUS

PDF

41.0 KB Authoring application: Karbon
MD5: 1ee60900b834e83ea31161d0c0092bad SHA-1: 5486ad8ed362ecfc930bd589ad8307dfca7c9f03 SHA-256: 0919ae96cc3a13a8574cf8328d393b23658a8d0b1dd8078ac07b8fadb4da7867
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support its malicious nature, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs are likely used to distribute malicious content or manipulate search engine rankings.

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://motoringlegaladvice.com/uploads/1/3/0/5/130550992/dikefadefifev.pdf
    • http://besinfinityinspections.com/uploads/1/3/0/4/130488875/c7a2ab3533f.pdf
    • http://rajurawi.najiyagalimova.com/uploads/2020/01/28/ladevijuwu.pdf
    • http://fearlessvisionmarketing.org/uploads/1/3/0/3/130323285/kukamejo.pdf
    • http://suja.zarokol.top/uploads/2020/01/27/sejekokisonive.pdf
    • http://nuovaedilart.it/uploads/1/3/0/2/130274269/7130600.pdf
    • http://bitsbridlesbrambles.com/uploads/1/3/0/6/130620340/7657158.pdf
    • http://barnfreshcycles.com/uploads/1/3/0/5/130551986/jobagedux.pdf
    • http://bartolomeilaw.com/uploads/1/3/0/3/130324248/130324248.html#s%C3%A9quence+antonymes+cm2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001248.bin
50327eab27c4cb7d4211ecf1e0906b646d97c0ed81d7eefe73c660f79b3ca350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1248 10552 bytes

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