Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a55a98675fa9001…

MALICIOUS

PDF

52.5 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: cd3d17eff8dfe0c01223c5764fe5b702 SHA-1: 3a1ea17a3d4ab5e3eb38493dd3997371613aca0d SHA-256: 8a55a98675fa9001ab153629f6688e521bae430c3300311f87b165f752b7c168
160 Risk Score

Malware Insights

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

The PDF file contains a link farm of 31 external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to a 'voice recorder application' and includes URLs that are part of this link farm. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious download intent. The primary attack pattern involves luring the user to click on these links, which likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://readingrescuetalk.com/uploads/1/3/0/6/130621951/c66d8.pdf In PDF document text
    • http://mytherapybox.com/uploads/1/3/0/4/130488220/xafunupujogo-pobilafamame-nemimadolidi.pdfIn PDF document text
    • http://dobikeplan.com/uploads/1/3/0/5/130546971/4c3c01.pdfIn PDF document text
    • http://sapek.wiki-energie.com/uploads/2020/01/27/wikerivuba-votosonoked.pdfIn PDF document text
    • http://successfulperception.com/uploads/1/3/0/4/130477945/b29b9d7f8ba8f0.pdfIn PDF document text
    • https://toxinagegiteluk.weebly.com/uploads/1/3/0/5/130551141/7d34ab07f15e9be.pdfIn PDF document text
    • http://nicoleedwardslimited.net/uploads/1/3/0/6/130620337/3513751.pdfIn PDF document text
    • http://fuzok.powking1.ru/uploads/2020/01/27/7165586.pdfIn PDF document text
    • http://zayavka-na-kredit.com:80/uploads/2020/01/28/6884314.pdfIn PDF document text
    • http://keepbouldersmug.com/uploads/1/3/0/4/130488773/6918571.pdfIn PDF document text
    • http://chitowngala.com/uploads/1/3/0/2/130292073/medorajiw.pdfIn PDF document text
    • https://bofixozaxuso.weebly.com/uploads/1/3/0/3/130313115/6e1a5667b19.pdfIn PDF document text
    • https://xatukoronixelaw.weebly.com/uploads/1/3/0/5/130590677/1142640.pdfIn PDF document text
    • http://rocksolidskilltraining.com/uploads/1/3/0/6/130640116/6ad1b5a408cf.pdfIn PDF document text
    • http://kookaburraretreats.com/uploads/1/3/0/5/130551981/nakepam_dujinuvenosar_nujutex.pdfIn PDF document text
    • http://coloradocriminallawattorneys.com/uploads/1/3/0/3/130379408/zusawejikobo.pdfIn PDF document text
    • http://designer-parties.com/uploads/1/3/0/5/130543351/lejiw-sinawiva.pdfIn PDF document text
    • http://kreativekidsworld.com/uploads/1/3/0/2/130288599/130288599.html#voice+recorder+application+freeIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1529 8040 bytes
SHA-256: 26744b865d55c0dd63d5857f6266bf5cd0a0045edbda3c5f2e8bbec229f1a7b8
font_01_sfnt_off0000746d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746D 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off00007d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 16420 bytes
SHA-256: f0028d727a01318fb4882a1ff4457f97009775ad781eace6eea82804ff51e9f6
font_03_sfnt_off00009275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9275 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086

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