Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfb017320fba7f3…

MALICIOUS

PDF

47.8 KB Created: 2020-09-03 09:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a47a04183738fde00414f91bc6c9816a SHA-1: 9d5a7a34642551c1eeef66598679530a2481a6b0 SHA-256: 1bfb017320fba7f3abd417b1d65ae02cbe15c6384190051061f1eb2e7b7175b1
160 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'video er pro extension chrome' and embeds multiple links. One critical heuristic identifies a malicious redirector link pointing to 'ttraff.club', which is likely used to host or redirect to malicious payloads. Another heuristic indicates a PDF link farm, with many links pointing to Shopify domains, but the primary malicious intent appears to be the redirector. The document body, though heavily obfuscated, contains the malicious URL and other Shopify URLs, reinforcing the social engineering aspect.

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.club/wix?keyword=video+er+pro+extension+chrome
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/kokarudivefibakozobakog.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/fatolalutupoloxuk.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/bloemfontein_south_high_school_application_forms_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/capsaicina_beneficios.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/sorolenugigu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/32763509847.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/wawulodadokixoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/93820526132.pdf
    • https://cdn.shopify.com/s/files/1/0452/4644/7776/files/9107318188.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/26935589901.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/setivenegi.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_74817552d3494db591cadcb50ca89713.pdf
    • https://static.usrfiles.com/ugd/b88e3d_09ed5ea0c9654fa4a7d8a38459e0141f.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_off00007c4a.bin
3b5a66da27e7b2d21b548a6c3d99335a0373ae86448e7c27165a688a8cac9084
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 5104 bytes
font_01_sfnt_off00008d8b.bin
28d902a1940fafa352a2b31372fd01a6ae996a8b21bb8d2b1a4a05608a43ad5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8B 10996 bytes