Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1bbca3479ec8bd…

MALICIOUS

PDF

43.1 KB Created: 2020-07-27 13:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a444d961b9b6e9091bcf28e2111ebf SHA-1: 2e5bf14c9d8138cb0d0dba93a4bc23dc2c4eb923 SHA-256: eb1bbca3479ec8bd2d15b8ae4a64e3bd8cb614ce852f83bec18558b98afb148c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure to install a 'Chrome app apk', aligning with the 'Browser extension / update installation lure' heuristic. This indicates a social engineering attack designed to trick the user into downloading and executing malicious content.

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=chrome+app++apk
    • http://files.littlesirestaurantandlounge.com/uploads/1/3/1/3/131383318/latakuvizowoje_dolasidab.pdf
    • http://files.greatwhitefarm.com/uploads/1/3/1/4/131409709/jizodovuselono.pdf
    • http://files.bradleyolson.net/uploads/1/3/1/4/131453861/1488540.pdf
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/5468800823.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/5235609548.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7965/files/ximigor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/28262965397.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/relapuxoleba.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/20863294988.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/xaduzikazijufiwezobiku.pdf
    • https://cdn.shopify.com/s/files/1/0440/5516/7126/files/11537769843.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/xebisakejezobigipunaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/74120217437.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d32.bin
fcb5700f556f8fab7c60117d181a8239c47144d9875ee3a5f98917618a94a158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 4488 bytes
font_01_sfnt_off00007c5c.bin
d6779bffe3e5f99e4369cc417798bdda3217eb24697a9ec5661e4f8004608f04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 10388 bytes

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