Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b82412a4f16d11…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 08:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10988a23657243c50edd45fd78675853 SHA-1: 829e12bc5b71f90a93b531028c2f50e320378cfa SHA-256: 21b82412a4f16d116ddeddb3e667432c8a1f8b6c60a8f06cfd9a47d7e7b6f207
160 Risk Score

Malware Insights

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

The PDF document contains a social engineering lure, instructing the user to install a browser extension or update to view content. It embeds numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=memorial+bookmark+template'. Another heuristic indicates a PDF link farm hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. The document body, though heavily obfuscated, contains the malicious redirector URL.

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=memorial+bookmark+template
    • http://dapuzon.onairadvocate.com/uploads/1/3/1/4/131437626/3e2ce76c200e.pdf
    • http://files.teamveventing.com/uploads/1/3/0/7/130739928/4658341.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/vagatufegivosupogidubewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/wusetosizizanimobi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/auditing_assurance_standards_icai.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2696/files/34226045405.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/rooftops_jesus_coulter_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/authority_responsibility_and_accountability.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/balaxijonibure.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/ansiedad_social_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/95171231814.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/31218090798.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/65898292116.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/domeligumukutejo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/latererugaxevoni.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_off000066ef.bin
aca52f9f0a41141175e4377055317c4a2b559a3acf9a3b928e13925c7e276c63
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 4996 bytes
font_01_sfnt_off000077d9.bin
3ade13cb1c54782fe1f7cfe10b976f9996bba6c481a4ab587f91fa8ac6f8f820
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D9 9976 bytes