Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d74ccd6492f92a…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 19:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de160ccb20f37d0e998b2df774711832 SHA-1: dbd1c184ab014dd3f11e7f4e01596de561533a2a SHA-256: c4d74ccd6492f92af927c4a9d015008df4923d5a99751f4fe8e99a58cc3fa015
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=using+radio+buttons+in+html+form'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to PDFs hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The document body also contains the lure text 'Using radio buttons in html form', reinforcing the social engineering aspect. The primary attack pattern involves tricking the user into clicking a malicious link under the guise of needing a browser extension or update to view 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.com/pify?keyword=using+radio+buttons+in+html+form
    • http://files.caringnannies.com/uploads/1/3/1/4/131408432/pujosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9692/3555/files/debirevigokebasinipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/zadizevasoroz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/14549858784.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/juxepuletofetim.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/xetubosil.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0729/files/37493584219.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/common_idioms.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/water_pollution_in_bengali_language.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/pneumatic_drilling_machine_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/nufife.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/figosok.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/lezovokuketutabu.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_off000062b7.bin
d0e561dcceeaa6bfd0b5165650d51c9fd42c9b507efc025bf6bbacd2a13bdb17
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 5452 bytes
font_01_sfnt_off00007508.bin
3046922a1f7560428fdb46ad407689714c6362ca930ee97b233c67f58db30220
pdf-font-stream PDF embedded font (sfnt) at offset 0x7508 14300 bytes