Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1452625656dbf7…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 22:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 798a048fae7fd050d1fa79ab3af7dffe SHA-1: cdbf75d80099c978261f4baef63b3093318e8fd1 SHA-256: cb1452625656dbf7bf57b4402a971db5ffb110d854a2d5a2d96f381e4015df01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com, which is a known malicious infrastructure. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links. The document body itself contains instructions that lure the user into executing commands via copy-pasting into a shell, a common technique for downloading and executing further malicious content. The presence of these elements strongly suggests an attempt to compromise the user's system.

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.
  • 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
  • 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=endospore-+forming+bacteria+explanation
    • http://files.mrbeckersclass.com/uploads/1/3/0/8/130874265/199e50eba5.pdf
    • https://cdn.shopify.com/s/files/1/0432/0945/7825/files/16741717339.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/nagidotulakifevabijov.pdf
    • https://cdn.shopify.com/s/files/1/0435/3468/0216/files/lemapofanusilasit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4516/7008/files/static_budget_definition.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/voliral.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/vewin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/17388624737.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/lujijelufuwuparat.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/vivaldi_l_estate_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/encyclopedia_of_mathematics_science_encyclopedia.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_off00006d47.bin
896a19bd0aa4b48518330ed140800f282119bba8a580ce00358d11e68d14be37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D47 5672 bytes
font_01_sfnt_off00008082.bin
7a679b59e50b6a38a5e0e6d1e6184a8421b52b09251fb3c498400950385b2732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8082 10292 bytes

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