Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bb9aef4fdd9abb…

MALICIOUS

PDF

41.2 KB Authoring application: pstoedit First seen: 2020-09-24
MD5: 01ea196f1b4d3e33c52f9bae281a5596 SHA-1: c87c1e69a8eb0d96e63c5f135e8be3efd2d904e4 SHA-256: 43bb9aef4fdd9abb6cb7f8620e25a5f27a4a3e4ad189faf349c64a081ec13c15
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which strongly suggests a phishing or content distribution scheme. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious intent. While no scripts were explicitly extracted, the nature of the embedded links points towards a spearphishing attachment attack vector.

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://tamingbigfootseattle.org/uploads/1/3/0/4/130476943/e5e7f702608.pdf In PDF document text
    • http://tonibrannan.com/uploads/1/3/0/6/130620776/pipujawavogipizoda.pdfIn PDF document text
    • http://striving4excellence.net/uploads/1/3/0/5/130589444/380c7cd9c30bbe.pdfIn PDF document text
    • http://jdlockhartphotography.com/uploads/1/3/0/3/130313836/zaxoxokopaguv.pdfIn PDF document text
    • http://montclairradiology.net/uploads/1/3/0/6/130639661/9d1d171055.pdfIn PDF document text
    • http://avalonlinenrental.com/uploads/1/3/0/5/130550818/vawovipok.pdfIn PDF document text
    • http://nupelicanparty.org/uploads/1/3/0/6/130605108/130605108.html#answers+for+why+you+left+a+jobIn PDF document text
    • http://linux.thai.net/projects/fonts-tlwgIn PDF document text
    • http://www.thaitux.infoIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129 8272 bytes
SHA-256: ae97fb668e5081d94cab9beea163727708b2f75f937a3a84205df030d9f2d120
font_01_sfnt_off0000594d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594D 10292 bytes
SHA-256: c7143368894299a997ed09f05024df052d964886bc902d598de4a6791c50751f

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