Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4e5dd711b85666…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 14:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8392b3c6747aa7363d7d4e3fb356e83e SHA-1: c326a0c13e322646d4da8791fb4a529b1a8050d2 SHA-256: 2b4e5dd711b8566634a8d2b45c4b5ce75f3772e9488096066f13f6ed00e3177b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a lure suggesting it is an 'informed consent form clinical trials template' to trick the user into clicking a link. This link, 'https://ttraff.com/pify?keyword=informed+consent+form+clinical+trials+template', redirects to malicious infrastructure. The document also functions as a link farm, containing numerous external PDF links, many of which point to static.usrfiles.com. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common social engineering tactic for credential theft or malware installation.

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=informed+consent+form+clinical+trials+template
    • https://static.usrfiles.com/ugd/913720_42e894f1c7b14bc09fef0fd3054643e2.pdf
    • https://static.usrfiles.com/ugd/32777b_287c5a04de334c38865becc84b8d2d28.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b535e3ad7641ceab5dcd7fd233ed9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_af46178635b24690bcc99f6758291b71.pdf
    • https://static.usrfiles.com/ugd/1d64af_bf057a3310864e1bac052224f8abbadd.pdf
    • https://static.usrfiles.com/ugd/bb13a2_5c2095f033fe4df9a74a91430efb9781.pdf
    • https://static.usrfiles.com/ugd/2c608b_7684d965d85a4c3aa03795867b7f863c.pdf
    • https://static.usrfiles.com/ugd/6240f8_d042cb2fa2cf4f03bef50e77c93d2645.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/chrome_extension_source_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0440/7567/9896/files/nevovefotopav.pdf
    • https://cdn.shopify.com/s/files/1/0432/5087/6578/files/haidos_marathi_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/bise_sargodha_rechecking_form_2018.pdf
    • https://cdn.shopify.com/s/files/1/0460/7423/2996/files/udemy_course_er_win._exe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/energias_renovables_en_chile_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/pretest_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1348/files/15813189048.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_off00006ef2.bin
e55506ae3331f10b54c2580a077bea42f2b8a8da49aae94315902b90e414cf1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF2 5236 bytes
font_01_sfnt_off000080af.bin
6f9df7f1f0716b0a5ba2474fbea4edd4c0fdd464fae2abf743a45bc7e18bda9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 10128 bytes

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