Malicious PDF — malware analysis report

Static analysis result for SHA-256 7913ca5b08096c6f…

MALICIOUS

PDF

45.7 KB Authoring application: pstoedit First seen: 2020-09-07
MD5: 32d462f88cfa91b19330b6e675648b43 SHA-1: ea75c931e67473ee0c75f9ec4f0769ec18387db6 SHA-256: 7913ca5b08096c6f7f5df50d1899a9aeebd4afa38fa1b677a49f5b6a5e9c774d
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a large number of external PDF links, suggesting a link farm or distribution mechanism. ClamAV identified it as Pdf.Phishing.TtraffRobotInstall, and an ML classifier gave a high confidence score. The document body contains numerous URLs pointing to PDF files hosted on various domains, reinforcing the link farm detection. While no scripts were explicitly extracted, the nature of the PDF and the embedded URLs suggest it is designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://pcbaugh.com/uploads/1/3/0/2/130271013/pofuku_wubopedeluzuj_leganipabiwo.pdf In PDF document text
    • http://mycusina.com/uploads/1/3/0/6/130621307/318bcc4b4616.pdfIn PDF document text
    • http://agelessfitness.net/uploads/1/3/0/6/130604687/41453e4f2a.pdfIn PDF document text
    • http://pleaseexcusetheshirt.com/uploads/1/3/0/5/130550982/6921090.pdfIn PDF document text
    • http://plumbingaltadena.net/uploads/1/3/0/6/130604606/dakusujopakikavob.pdfIn PDF document text
    • http://asiabnpparibas.com/uploads/1/3/0/6/130603948/wesubazamu.pdfIn PDF document text
    • https://lebajakemok.weebly.com/uploads/1/3/0/5/130588185/rubidepexeri.pdfIn PDF document text
    • http://sofienbergbilvask.net/uploads/1/3/0/3/130312957/fisogegetitaxo.pdfIn PDF document text
    • http://davidmarquesibanez.com/uploads/1/3/0/6/130620934/130620934.html#my+ambition+essay+in+english+pdfIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A 8836 bytes
SHA-256: 4f922d3e6d8cf69e779af23c0d53128e19256f694a2bea9ffc8b73dcbdf1ab81

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