Malicious PDF — malware analysis report

Static analysis result for SHA-256 135c95ca65d2977b…

MALICIOUS

PDF

30.5 KB Authoring application: Scribus
MD5: 16a0f5f27c1e312dec5bb4c83c479960 SHA-1: c1df1fba213421e8e5283f05df2544537366a8b7 SHA-256: 135c95ca65d2977b82994153a1e64f12e0606a95a4337f4f129be55893316de8
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 external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV detected this file as Pdf.Phishing.TtraffRobotInstall-7605656-0, and an ML classifier also flagged it as malicious. The embedded URLs are the primary IOCs, suggesting a phishing or content distribution campaign.

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://rik.itplanet.agency/uploads/2020/01/29/8738123.pdf
    • http://perthkitchendoorreplacement.com.au/uploads/1/3/0/2/130271099/dabidapa-bupidon-garomixa-kepunezidawan.pdf
    • http://riversideatwollaston.com.au/uploads/1/3/0/4/130488396/rokagevewa.pdf
    • http://ygautos.com/uploads/1/3/0/5/130539795/2b8a3b.pdf
    • http://vasal.damvdolg.su/uploads/2020/01/28/xuluzetitoxadalajo.pdf
    • http://mhdtechcorp.com/uploads/1/3/0/3/130324326/9496971.pdf
    • http://aimeelora.com/uploads/1/3/0/7/130739232/vunoxunize.pdf
    • http://newstylemarket.com/uploads/1/3/0/3/130323160/130323160.html#servicenow+role+to+share+reports

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000114f.bin
d4026e46b3dbfa46ffd27d4d5b71c8c431913ce0f4344a9768535cc87a225fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F 8184 bytes

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