Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c9946139df2de4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 18:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc48c32067ffa6dc07e6afe51b262856 SHA-1: 217550765b8c756bc267b637b776db4bf20cb638 SHA-256: 58c9946139df2de47084a050e9adc2988f6ca6db9c043f740ac2e2b5eb266410
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also fires heuristics for a link farm and a social engineering lure to install a browser extension or update. The primary malicious URL identified is ttraff.ru, which is likely used to redirect the user to further 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/wix?keyword=uc+browser+10+jar+java
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/justo_a_tiempo_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/vesubejesudupufaziremuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/4164/2906/files/56738434676.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/rojefesasofekuvif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/30452711800.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/juketutof.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/69278128804.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/15649915187.pdf
    • https://cdn.shopify.com/s/files/1/0429/9158/3391/files/81684033973.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/wumijelep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/62333749600.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/9484875018.pdf
    • https://cdn.shopify.com/s/files/1/0432/9560/4891/files/minecraft_unblocked_at_school_no.pdf
    • https://static.usrfiles.com/ugd/fe83c3_2079fd2faa074fb69ce72e569707b945.pdf
    • https://static.usrfiles.com/ugd/b8c837_90b82dd3c4f5440cb9f5d1adc5df0bd1.pdf
    • https://static.usrfiles.com/ugd/902d29_01c87a77cfb946cfb50c7ecc9c319097.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_off00006459.bin
415fcff1f90efacde372aac63ff0e5e800bfcb23db26d45539796ed8f81f3144
pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 5316 bytes
font_01_sfnt_off0000769e.bin
0135fd2671d55a4cd2d8b7ebcaf1184ee8a790222be5a2668015687447cd4ae7
pdf-font-stream PDF embedded font (sfnt) at offset 0x769E 11036 bytes