Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3566104d58a76e8…

MALICIOUS

PDF

39.0 KB Authoring application: Smallpdf Desktop First seen: 2026-05-08
MD5: 81e8445066cc09ec6ffc6e46affc1460 SHA-1: 1008e35dec0c001c2156efc1156ba1adae626390 SHA-256: a3566104d58a76e8e536bd3d65eaf93e592ee97d60fe16fa05d7d964b26b67fa
152 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ClamAV with the signature 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. Static analysis revealed a significant number of embedded external links, indicating a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to lure users through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://makersarena.com/uploads/1/3/0/7/130776541/tamevogugijof.pdf In PDF document text
    • http://www.lekkerbru.com/uploads/1/3/0/7/130739326/sodajogex_xixinabin_musasid.pdfIn PDF document text
    • http://midimoiselle.com/uploads/1/3/0/2/130288462/060f50.pdfIn PDF document text
    • http://neilfoxhealthandfitness.com/uploads/1/3/0/6/130604986/a7976aaac.pdfIn PDF document text
    • http://kresadmissions.com/uploads/1/3/0/6/130639514/mawikojosep.pdfIn PDF document text
    • http://ellacart.com/uploads/1/3/0/5/130538994/81ba1c3.pdfIn PDF document text
    • http://mymonarchs.com/uploads/1/3/0/7/130739470/niwamatebub.pdfIn PDF document text
    • http://hawkemusic.net/uploads/1/3/0/6/130639904/95d38efe5a7.pdfIn PDF document text
    • http://daddysduties.com/uploads/1/3/0/7/130739289/borunoxofafetuzesa.pdfIn PDF document text
    • http://shopparkergrace.com/uploads/1/3/0/5/130551319/rokikebirutukeg.pdfIn PDF document text
    • http://jennaleigh-photography.com/uploads/1/3/0/7/130738534/e244dfadf1bb7.pdfIn PDF document text
    • http://bearversusbaby.net/uploads/1/3/0/8/130874218/basupajetizarijiduv.pdfIn PDF document text
    • http://acehires.com/uploads/1/3/0/7/130738821/fifezulogemumake.pdfIn PDF document text
    • http://lifewifemotherhood.com/uploads/1/3/0/8/130874030/3639628.pdfIn PDF document text
    • http://sloansinventories.com/uploads/1/3/0/6/130639800/kusigenokenekis.pdfIn PDF document text
    • http://webdisk.ajrplasteringessex.co.uk/uploads/1/3/0/7/130775205/4878296.pdfIn PDF document text
    • http://74-123-73-11.mgwnet.com/uploads/1/3/0/6/130620379/443858c88a7e.pdfIn PDF document text
    • http://cloud.sentinel-air.com/uploads/1/3/0/6/130639728/130639728.html#rutinas+para+abdominales+principiantesIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B39 8616 bytes
SHA-256: 2d1195efde36d1b0d2f47017c74c91dbdd5626e9e43352245740ee6e091768d9

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