Malicious PDF — malware analysis report

Static analysis result for SHA-256 33706b0469110f57…

MALICIOUS

PDF

117.0 KB Authoring application: Smallpdf Desktop
MD5: 4a744215ce6dbeaa6746b52baa65142e SHA-1: 872b679d03c60149934f4baa70f9ddf7d9ff1ed8 SHA-256: 33706b0469110f57559512ef3a596e75f6b5e38f58087a735fb27ce57c8fcaa9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on various domains, suggesting a link farm or redirection scheme. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the heuristic 'PDF_SEO_LINK_FARM' indicate a phishing or malicious redirection attempt. The embedded URLs, particularly the first one hosted on 'mountainafrica.co.za', are likely the primary mechanism for delivering the malicious payload.

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://mountainafrica.co.za/uploads/1/3/0/3/130313010/tipewunazu_dijedutaz_nigufanogarewor.pdf
    • http://noorbeautyparlor.weebly.com/uploads/1/3/0/5/130550980/defuper_zijoka_fenej.pdf
    • https://tufodafaleb.weebly.com/uploads/1/3/0/5/130590361/gafuvovalivusagof.pdf
    • http://sustainablegreenlife.org/uploads/1/3/0/5/130543764/putubigadenipow_kujogom_dodubepibufof.pdf
    • http://localbitprice.com/uploads/1/3/0/6/130604486/jimisatesefutofimib.pdf
    • http://camdenlawncare.com/uploads/1/3/0/5/130544889/kigobavijabuwot.pdf
    • http://cliquefashion.shop/uploads/1/3/0/2/130274349/3790f066a24c86.pdf
    • http://bealegacybuilder.com/uploads/1/3/0/6/130620833/bimuwe_jufun_jefinivesulu.pdf
    • http://gameosphere.com/uploads/1/3/0/2/130288483/momavodejufos.pdf
    • http://danaink.org/uploads/1/3/0/6/130620793/somog-zepusi.pdf
    • http://mychinesewatch.com/uploads/1/3/0/6/130605097/130605097.html#kc+undercover+season+1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000053b5.bin
118c564762d7032789e0e6b3bb23956e043fcd005cad89fa010ca0a92140c692		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B5 18172 bytes
font_00_sfnt_off00001451.bin
1f62dd3c4230a8e39f43823e42c79952b0d4e68cfb6b9f605ade55b3f22518ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1451 9076 bytes

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