Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7af41898f5af4e…

MALICIOUS

PDF

52.6 KB Created: 2020-09-01 00:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0013184954a728aefba164bc93b60c93 SHA-1: aac013018e4bde87aea4db82c30ebf6dc5325108 SHA-256: da7af41898f5af4ede50285c26ec303fff5ae1d1b2aa9573c9517d38e8c6f4cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains a social engineering lure, instructing the user to install a browser extension or update to view content. It embeds numerous links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=template+wordpress+company+profile+gratis'. The document body, though heavily obfuscated, also contains this URL and other benign-looking Shopify links. The primary attack vector appears to be redirecting users to malicious infrastructure under the guise of content viewing.

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/wix?keyword=template+wordpress+company+profile+gratis
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/cll_guidelines_nccn.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/18960440836.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/arthur_schopenhauer_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/41854236865.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/dafapidevavijogamidabi.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d3cd954f1da4bada83340c99be8475f.pdf
    • https://static.usrfiles.com/ugd/122077_fe601ad76e5b420ea9d13386f982e213.pdf
    • https://static.usrfiles.com/ugd/b9801a_6ebe7b76e4914994b16ab30d116c4e56.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/44655513507.pdf
    • https://cdn.shopify.com/s/files/1/0446/3194/9475/files/android_phone_under_3000_rs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5738/files/copper_sheet_metal_scrap.pdf
    • https://cdn.shopify.com/s/files/1/0465/1492/9822/files/70731699891.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/lomuxodibotomuxutome.pdf
    • https://cdn.shopify.com/s/files/1/0465/9645/6613/files/51066501139.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/95844111716.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/30020846208.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/busedifapafoxusutezor.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/27828312669.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085c7.bin
9ba0d19962cd23797cf386061cde440418da66322ecf6f924f704554f1e4e4e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C7 5620 bytes
font_01_sfnt_off000098dd.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98DD 1800 bytes
font_02_sfnt_off0000a16b.bin
3ae5fe118c26b45a2f6dad4eb1c140e59aa362dd6f173f9a5efb8ca6dbe546b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA16B 10212 bytes

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