Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30b5ec176cc934b…

MALICIOUS

PDF

47.0 KB Created: 2020-08-21 11:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44595845d3b3b0b6cbaebbc9db40da15 SHA-1: ae678d2016b377ea6d1da5ef90852bb5b663837e SHA-256: e30b5ec176cc934bcf51b19cb585bc4bd6a9ab61d2485521d15bb8757d73343a
160 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in a social engineering lure to trick users into installing a browser extension. The document body and embedded links further support this by referencing 'Puffin browser pro apk free uptodown' and a large number of other PDF files, indicating a link farm designed to attract traffic. The primary intent appears to be driving users to malicious infrastructure via the 'ttraff.com' redirector.

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.com/pify?keyword=puffin+browser+pro+apk+free++uptodown
    • http://files.nevebros.net/uploads/1/3/1/4/131437174/xaririfiregimuzitoj.pdf
    • http://files.mathzaptutoring.com/uploads/1/3/0/8/130874128/3793394.pdf
    • http://mavegejos.goodlifedaily.org/uploads/1/3/1/4/131406893/312975.pdf
    • https://cdn.shopify.com/s/files/1/0437/1821/3797/files/arctocephalus_australis.pdf
    • https://cdn.shopify.com/s/files/1/0458/2860/4067/files/62482436946.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/71813832058.pdf
    • https://cdn.shopify.com/s/files/1/0447/7183/6055/files/basic_interview_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2184/3106/files/lemekilegevofuned.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/neoclassicismo_e_preromanticismo_letteratura.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/99860457478.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/46753858806.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/fawalujozotusojarolijofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/31041899812.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/41997971830.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_off000069de.bin
551f352b4c102fe1e34a05e9fb2f45b163682605f5f4c939d7a5844a5aa9199e
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 5300 bytes
font_01_sfnt_off00007bf3.bin
1f339cd2415ccd6c83a7e656049dd6befbed1c7e231ce396cb49477f9cb4fcb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF3 3544 bytes
font_02_sfnt_off00008a6a.bin
354091c867eee3d7accd8734eadd50dbad861789bc4d11046a3a08a8fe52bb99
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6A 10632 bytes