Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d188496403bfee2…

MALICIOUS

PDF

34.8 KB Created: 2020-08-18 21:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d864cda4cb0a9fd6f3a7275c16b63b SHA-1: 0231d956b77127e804061cb8305d6d543ec90dcf SHA-256: 8d188496403bfee22ef0d2f0ea8fa3b4fc16d5e8af029b9bbb099cc94ec9f42e
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a social-engineering lure, instructing the user to install a browser extension or update to view content. This combination suggests an attempt to trick the user into navigating to malicious infrastructure, likely for credential theft or malware delivery.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=facebook+video+er+apk+full
    • http://mipuze.themagicsessions.com/uploads/1/3/2/6/132681946/66644.pdf
    • http://files.dateworks.co/uploads/1/3/1/8/131856827/rikosinomide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/suddenlink_san_angelo_tx_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/76695320442.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/pepupaferuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/8947/8307/files/bexaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/88878490467.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/transfer_allowance_form_for_central_govt_employees.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/wexovekofedorolanuniresew.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/73776928667.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/89012630984.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_off00004b7c.bin
79a7d406c5b42e8a450217a3ad82111b4bf589f7684398f4a1567be0f3c8ab98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7C 5192 bytes
font_01_sfnt_off00005d31.bin
ba3cc44ca5b1f70f5f28ee18a7e9f1a3f31c6accfec60c102ae4e5180215a551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 9864 bytes

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