Malicious PDF — malware analysis report

Static analysis result for SHA-256 de219ff2c21778ed…

MALICIOUS

PDF

32.4 KB Created: 2020-08-16 22:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43bb94d04fd5690e0e6289dfa0ff7af0 SHA-1: 4d9226d49df44af2d2bed34d40dd178d6f86c5ba SHA-256: de219ff2c21778ed6d67b85abfe6973c13e5666364d0e873179b78a1683a8094
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO spam or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure, 'Unusual occurrence report form', and the malicious redirector URL. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=unusual+occurrence+report+form
    • http://files.westbrookbromham.co.uk/uploads/1/3/0/7/130775719/8269674.pdf
    • http://dogevexi.national-ds.com/uploads/1/3/1/3/131384260/1040836.pdf
    • http://files.envisioneyewear.net/uploads/1/3/2/6/132681954/e1db5c6a3.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/solicitud_de_tarjeta_de_credito_banesco.pdf
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/sumapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/how_do_you_cheat_in_cookie_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0452/1082/8960/files/52413036628.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/search_engine_for_free_files_and_ebooks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1577/files/9980054648.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/arquetipo_de_cliente.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/minecraft_1._5._2_servers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/texas_renew_drivers_license.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/53924022004.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/porikut.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/putenowebigimutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/kekilamevaw.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_off000044dc.bin
ed28c559419de1f7050d4bcb397bf962aef29b0fefe300fc4f69ce06cd97f955
pdf-font-stream PDF embedded font (sfnt) at offset 0x44DC 5152 bytes
font_01_sfnt_off0000564b.bin
dab00ca0dc399fe944fd8cf058c169c2e7d89f2b6e6c24e1706abc62dcef69a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x564B 8960 bytes