Malicious PDF — malware analysis report

Static analysis result for SHA-256 f518b76d6e95c249…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 02:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b63ef5a913f3d4a173d39e60ae1f9e41 SHA-1: 745bc5fe85fc20fe57523c501823a04e5b5680e0 SHA-256: f518b76d6e95c249a0028796d2460854e191de5ef972f650f4fc6be9d87ec637
160 Risk Score

Malware Insights

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

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 browser extension installation lure, suggesting a social engineering tactic to trick the user into clicking the malicious link. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bleed+and+crop+marks+on+pdf, which is likely used to redirect the user to a malicious site.

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=bleed+and+crop+marks+on+pdf
    • http://files.alibilr.com/uploads/1/3/1/3/131398419/938499.pdf
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.drawingonmusic.com/uploads/1/3/1/3/131379312/5905177.pdf
    • http://libila.michiganpreventionassociation.org/uploads/1/3/2/6/132681352/ragusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/88478406067.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/entrepreneurship_development_and_business_communication.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/dwarf_fortress_glass.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/xizaxuliwovegosefarexubud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/arraydeque_vs_linkedlist.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/nutumugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/rojifapizidosefije.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/76673156224.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/vofupakodojova.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/60422497063.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/brahma_purana_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/river_phoenix_last_photo.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_off00006c77.bin
d5084425c3cbe376d77743816074d664acc5fc0091b90f8fc35defc23c54c83b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C77 5416 bytes
font_01_sfnt_off00007ec6.bin
7c5455557f632675ff37a7e45f28eea865539f1e4fc9a87e3e2ec17c00d6293f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC6 9968 bytes