Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49af197bc67f4ed…

MALICIOUS

PDF

40.2 KB Authoring application: Poppler-utils
MD5: 0cb01fef65d36a10fc10ab19b5a108fe SHA-1: 429c4129dd28403853de44b46ded8989ce5652d4 SHA-256: a49af197bc67f4ed09e162f5cef1bab3c60f308819363e21a515ef1b676758a0
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical finding for a PDF link farm and ClamAV detection as Pdf.Phishing.TtraffRobotInstall. The embedded URLs suggest a phishing or SEO-based malicious distribution strategy. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bagakewiwo.melikset.ru/uploads/2020/01/28/powuvemuneduvoge.pdf
    • http://channelingthelight.com/uploads/1/3/0/6/130621233/1bda65e2ee.pdf
    • http://nycbicycles.online/uploads/1/3/0/7/130739488/e8aab8334.pdf
    • http://shardexplorers.com/uploads/1/3/0/7/130775277/130775277.html#acorus+calamus+uses+in+tamil

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000ff1.bin
8097b7381fb9d6e5a90071df5e23c59baced8d376770f954ae2e2cfdec091793		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1 8540 bytes

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