Malicious PDF — malware analysis report

Static analysis result for SHA-256 946e369fac53a500…

MALICIOUS

PDF

43.1 KB Authoring application: pdf-parser
MD5: ee4ccccf7967823ba4273b7ac294d049 SHA-1: 14692b1f7608100452a989cd48ff12617c729545 SHA-256: 946e369fac53a500c69f31f4495d6e2e7e8c936f4fe71a804f5e69de1e0d61f1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files hosted on various domains, a technique often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a link farm, suggesting the primary goal is to redirect users to potentially harmful content.

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://myannuityguru.com/uploads/1/3/0/5/130550997/naxub.pdf
    • http://monarchlax.com/uploads/1/3/0/4/130483558/3750978.pdf
    • http://submergeministries.com/uploads/1/3/0/5/130547515/sarigusonoper_tapajeg_juwipimi.pdf
    • http://cwcphysio.com/uploads/1/3/0/3/130312971/38329.pdf
    • http://vintagehomenewyork.com/uploads/1/3/0/7/130739535/voxakogotakutifi.pdf
    • http://newbornumc.org/uploads/1/3/0/6/130639037/c52f51b.pdf
    • http://tipujevos.opr4.icu/uploads/2020/01/28/dc095973.pdf
    • http://reboundat.com/uploads/1/3/0/2/130272396/130272396.html#basic+chemistry+review+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c9.bin
60d84e081fd3e2a9d672228716e58fc4a3b967523c50243c2e2dbe21893b9a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9 9788 bytes

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