Malicious PDF — malware analysis report

Static analysis result for SHA-256 86110f31ac9ac0db…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 11:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a4f567014e596444e5f74df7c5e9361 SHA-1: 3ab17755226d702790262743c01c20921ece5c32 SHA-256: 86110f31ac9ac0db5151d0ff1b3e3092028e57c0738ca77fc63e6ccd55713965
168 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=nifskope+skyrim+special+edition'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is 'https://static.usrfiles.com/ugd/b8c837_6ba75142c7ae4212aef37ea6fb412455.pdf'. The document also includes a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. The presence of these elements indicates a likely attack pattern involving redirection to malicious sites and potential command execution.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nifskope+skyrim+special+edition
    • https://static.usrfiles.com/ugd/b8c837_6ba75142c7ae4212aef37ea6fb412455.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3790cfcef234d76893c26ee38e8193e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c51820f48f492b9c12623f66e317ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbe70f2f25074dabbed2f35ee81cf7bc.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/zatidovuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/belfast_city_airport_flight_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/34278418708.pdf
    • https://cdn.shopify.com/s/files/1/0468/1518/3002/files/57222666051.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/basecamp_2_all_files.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/office_telemetry_agent.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/78752182660.pdf
    • https://static.usrfiles.com/ugd/b8c837_d60ebab9554d4247b20a0034793baf23.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f4690af8743433699ead449f78db290.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_off000057a8.bin
ebb8f13d84ec1baea4fe6af864af180168b10e8ea7df795156853a6dbca2bbfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x57A8 5436 bytes
font_01_sfnt_off00006a1b.bin
7806fb39b67eaa5d6f72b42e1f170b3b90746c199d651b37b289a98ac04aef63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1B 10968 bytes