Malicious PDF — malware analysis report

Static analysis result for SHA-256 778c9de6affc85ac…

MALICIOUS

PDF

77.2 KB Authoring application: SWFTools
MD5: a6b38e9cb154b5697b23650cf6cede44 SHA-1: 763286d25d1491eb723b850857d68466cc245acf SHA-256: 778c9de6affc85ac275f189f24fa7c25596cda501b4f48543aa746d9cfee1a09
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV specifically identifying it as 'Pdf.Phishing.TtraffRobotInstall'. The embedded URLs suggest a phishing or malicious redirection attempt, likely to distribute further malware or content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://lidupupu.mimonostore.com/uploads/2020/01/28/2841824.pdf
    • http://bestofbaliadelaide.com/uploads/1/3/0/3/130323599/2940821.pdf
    • http://nlccpsw.org/uploads/1/3/0/5/130538818/dojiloxavonoke_dabafanaguz_tatarux_xavifaw.pdf
    • http://associationsdesservants.fr/uploads/1/3/0/6/130639143/pipizakabirevasep.pdf
    • http://misbailes.com/uploads/1/3/0/4/130479008/130479008.html#wheel+of+time+book+15+pdf
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fe.bin
47a882c9d630d044f56726c48c4297c5e22309ffe5ac8eec18832b9271f2fc7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE 9296 bytes
font_01_sfnt_off0000f1d8.bin
2c17c2a4e33f5e590b3226416c47604bc736e243e5bb24840e0592bec9d799ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D8 4312 bytes

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