Malicious PDF — malware analysis report

Static analysis result for SHA-256 536e83e1a4828479…

MALICIOUS

PDF

35.9 KB Authoring application: pdf-parser
MD5: 1c17861335ccdd1f5257b2c7a16e1931 SHA-1: 6e3e93829c0080c768db9b8ae4afbabb990b862a SHA-256: 536e83e1a4828479970187a326200c1a3314f4dbc391f0af3cfd746b220610de
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or redirection mechanism. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. No scripts were extracted from this sample, but the structure and embedded URLs point towards a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://toreyfox.com/uploads/1/3/0/3/130323794/2654311.pdf
    • http://merkabawellness.com/uploads/1/3/0/5/130590673/guruzutokadoku.pdf
    • http://lockdescape.com/uploads/1/3/0/5/130550938/348256.pdf
    • http://xidilu.lafethome.ru/uploads/2020/01/27/funukebefejus.pdf
    • http://blast-man.com/uploads/1/3/0/5/130542692/gawipuzazam-dumonedowoxo-metosetepewu.pdf
    • http://reimaginingwellness.com/uploads/1/3/0/3/130323647/3ed31e14f8cc92.pdf
    • https://monokagixajazo.weebly.com/uploads/1/3/0/6/130604625/kelapug_jokigif_kofedakufijoge.pdf
    • http://70008922.nhd.weebly.com/uploads/1/3/0/6/130620957/2924666.pdf
    • http://myloveclub.ru/uploads/2020/01/28/3d527.pdf
    • http://moannasworkroominteriorsandstaging.com/uploads/1/3/0/5/130588556/130588556.html#actuary+exam+practice

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e6.bin
7380643df7c17b45908bb753e3cedd18c5d9309f288d9de8dc91731462dd9c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6 8396 bytes

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