Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df70ad50be5067a…

MALICIOUS

PDF

41.0 KB Authoring application: Smallpdf Desktop First seen: 2020-09-24
MD5: 8971de482c67f034fcfdfe351b630e79 SHA-1: f6a4d6093ed4ea2e149c3011cae7c03aa7623974 SHA-256: 9df70ad50be5067aeebddadc3160d2c239c0806e6ffa145572aafa2723421577
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the malicious nature of this file. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sobroradio.com/uploads/1/3/0/6/130603809/1430477.pdf In PDF document text
    • http://budsmotorauctions.com/uploads/1/3/0/6/130639192/bazopevegagex.pdfIn PDF document text
    • http://lifawuz.vipiski-besplatno54.icu/uploads/2020/01/29/paxovi-papepo-fugitifi.pdfIn PDF document text
    • http://bardfamilymarketgarden.com/uploads/1/3/0/6/130605490/gefawiza_xedokatorurebo_zexigiti.pdfIn PDF document text
    • http://clivoeq.com/uploads/1/3/0/4/130476481/tatomiwixowajo.pdfIn PDF document text
    • http://rubymacfashion.com/uploads/1/3/0/2/130289778/bd7521afba.pdfIn PDF document text
    • http://domainchangers.com/uploads/1/3/0/4/130488696/rezese-noresoxur.pdfIn PDF document text
    • http://cordivanoapparel.com/uploads/1/3/0/2/130270901/a7445.pdfIn PDF document text
    • http://davidmarquesibanez.com/uploads/1/3/0/4/130490053/130490053.html#epilepsy+medicine+shortageIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3 8316 bytes
SHA-256: a5a85613bd18431de4c8727269f1f6c8f5b972be4b0fe860f3b9d62310501afa
font_01_sfnt_off00006485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 2860 bytes
SHA-256: 4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912

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