Malicious PDF — malware analysis report

Static analysis result for SHA-256 d595b069fedd849f…

MALICIOUS

PDF

75.5 KB Created: 2020-07-13 19:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb7b9db498ee99122516e5889729af3 SHA-1: 60a846b9cdeb68a19ce62e63f40ca243676eaf52 SHA-256: d595b069fedd849f670bfd5a8fa6932fd89af11b22ee6e809db612bd79b903b5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, disguised as a maintenance manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates a direct link to a known malicious redirector, while PDF_SEO_LINK_FARM highlights the extensive use of external PDF links. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 https://ttraff.cc/wb?keyword=manual%20de%20mantenimiento%20centro%20de%20lavado%20frigidaire
    • http://files.weststormontwoodlandgroup.org.uk/uploads/1/3/1/4/131437044/towes-bubel-tuwolabijufuzi.pdf
    • http://files.cathyxwu.com/uploads/1/3/0/7/130740375/9670320.pdf
    • http://files.mymodernsolutions.ca/uploads/1/3/1/3/131380612/nukaferutetubixo.pdf
    • http://files.designinghealth.org/uploads/1/3/1/6/131637291/4e0d6f9f4c7a.pdf
    • http://files.theliteraturefactory.com.au/uploads/1/3/2/3/132302907/moganafezizewan.pdf
    • http://files.okobojisailingcenter.org/uploads/1/3/1/6/131636984/6777844.pdf
    • http://files.burchlearning2.com/uploads/1/3/0/7/130776327/murapu.pdf
    • http://files.hope2farmers.org/uploads/1/3/1/4/131482953/ketelojomajipo.pdf
    • https://xutogoronobu.files.wordpress.com/2020/07/15018891884.pdf
    • https://rebutoso.files.wordpress.com/2020/06/42995033151.pdf
    • https://gubobag.files.wordpress.com/2020/06/82541728999.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/ruzupunetova.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/82476899069.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/fofexelos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/gapoxopenadesujavafajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57308776079.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/pojiz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72a.bin
d25704c8835047672a2a794e1951669210ab71af5968febae21808d091cea5be
pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 5112 bytes
font_01_sfnt_off0000f87a.bin
0e00f15c216c9e1b65d3e856cf04b37645c52384f4d14582979d4ed727297937
pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 11936 bytes