Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca73245e224b4285…

MALICIOUS

PDF

49.2 KB Created: 2020-08-17 04:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b724f854e2e52c1c2aff91f99af9721c SHA-1: 1e1d802e60740924d9b56fde70df86d675f0c004 SHA-256: ca73245e224b4285c4aee9bd31f0201c53a77bd57cafcfa31ada41f6b9c4ed19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, likely for SEO poisoning or to host further malicious content. The document body, though heavily obfuscated, contains text related to 'Nox application android emulator' and a URL, suggesting a lure to install software or view content. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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=nox+application+android+emulator
    • http://files.storiesonstage.org/uploads/1/3/0/7/130775249/nivezoruzezimo_larizit_puteganija.pdf
    • http://files.visionandvisionloss.org/uploads/1/3/1/4/131406744/303761.pdf
    • http://files.makoontz.com/uploads/1/3/2/7/132710795/6b547.pdf
    • http://files.linncodems.org/uploads/1/3/1/6/131636655/nurabokutava.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4496/files/63893634172.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/bodofibufikesaxixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3971/files/10978105482.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/jupugol.pdf
    • https://cdn.shopify.com/s/files/1/0439/9667/6254/files/core_java_interview_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/mibuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/sociology_the_essentials_8th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0449/0467/7543/files/porsche_cayenne_2020_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/66993277935.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/15009714795.pdf
    • https://cdn.shopify.com/s/files/1/0429/7516/6620/files/xakejigezipulukebulozuwi.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_off00008412.bin
d5646dbb5527960cbf744c42528911df4d6098f99b488cdcdeafdec7572a9570
pdf-font-stream PDF embedded font (sfnt) at offset 0x8412 5080 bytes
font_01_sfnt_off0000953f.bin
8e2fa2e4f4aa8a3e073dc6f48015bf502e0908232f1dbd8b464f23cc3d01ede5
pdf-font-stream PDF embedded font (sfnt) at offset 0x953F 10196 bytes