Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff8f7fa155d3971…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 08:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d2b628fa5a07b0fc3e9a9963931caf1 SHA-1: 63dab2c5b157b87655b3baa8a979c6bdf78f5479 SHA-256: 8ff8f7fa155d397138b7ea9928371799a59435e4d2e2a5c1d6f44c60b5189c31
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as a document about teacher absenteeism. One of these links, 'https://ttraff.com/pify?keyword=causes+of+teacher+absenteeism+in+schools+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest a link farm or phishing attempt designed to lead users to malicious sites.

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.com/pify?keyword=causes+of+teacher+absenteeism+in+schools+pdf
    • http://files.palisadescc.org/uploads/1/3/0/7/130739233/potomumo_sinok_nufiparebokod_sefosozo.pdf
    • http://files.zhiguohe.com/uploads/1/3/0/7/130775304/20b19caba8.pdf
    • http://files.garryoak.info/uploads/1/3/1/4/131410094/c9116763d2.pdf
    • https://cdn.shopify.com/s/files/1/0439/3972/5470/files/kufim.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/kimurepalamareba.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/belajar_membaca_tk_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/bupawosefopikitav.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/1707860172.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/rorenetalokunezuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/65691454403.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/zirusegewavilirigarozovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/buwujeximamed.pdf
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/savawavex.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/13367972204.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/41623517521.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_off00005f74.bin
94110df2f89963e5b1bc93fa2fc095c6d43a2f9bd8d7ca764693853364dea4a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 5440 bytes
font_01_sfnt_off000071bc.bin
549553b638953c93bf329ff9e39c34c41263c4a9d088146c1af314cac2d1022f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BC 9760 bytes

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