Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd192ade8577b9bf…

MALICIOUS

PDF

45.9 KB Created: 2020-08-29 19:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59684fe5266d560ab19822e85abf6d3 SHA-1: 074e1072f5d4376d154ef390e906b8d14e47ad8b SHA-256: cd192ade8577b9bfa3dcb9a8782aa7258e5b81c7f936c0a2dddeadca41aa0f33
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This URL is associated with a lure for remote support tools like AnyDesk. The document also contains a large number of embedded links, many of which point to PDF files hosted on various domains, suggesting a link farm for SEO poisoning or traffic generation. The presence of a remote-support tool lure in an unsolicited document is a high-risk indicator.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=anydesk+for+windows+xp+free
    • https://static.usrfiles.com/ugd/b8c837_ed2611ed69e142f2a28598a3986cfe9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_af3fb698941c4120bcebc329ca68dcf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_61aa954e9a2c416e8cf530f4bbf5c2ce.pdf
    • https://static.usrfiles.com/ugd/34ec99_28d163dc864e4e7a91eb7d0e101f15bb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/zelexifefusedapofow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/wedding_invitation_template_free_lilac.pdf
    • https://cdn.shopify.com/s/files/1/0432/2030/4034/files/fiwojuzufopabivola.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/nupasixeninupi.pdf
    • https://cdn.shopify.com/s/files/1/0465/0618/0758/files/85788228772.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cc8e483236b4629a2d83a1a97a25f86.pdf
    • https://static.usrfiles.com/ugd/b8c837_05246396908f44b8971119f04f5d048c.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3062/files/borland_c_builder_4._5.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/dinuba_platinum_theatres.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/android_studio_usb_debugging_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/26846128788.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/numuvos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058de.bin
bb3c9a0c82320c123abda651710fb5b84f4e85e13a5e684ef2692cc88e267e47
pdf-font-stream PDF embedded font (sfnt) at offset 0x58DE 5108 bytes
font_01_sfnt_off00006a70.bin
221b4749ec2c8fdb20f1c4a1b5c72a3fe56ff6c69f400275c3ceb7209f8ccc82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 9824 bytes
font_02_sfnt_off00008c47.bin
63c79c92d76ff51ccfc8d339742764ebce1c79a30c6580b1d2b9284b2824b557
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C47 18424 bytes