Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5670ea31bb5a81b…

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 19:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4159168f9b0c899d0c8bd41acf7fbe14 SHA-1: 457b78cab6437087df358b14080a36aa839e3b98 SHA-256: b5670ea31bb5a81bc1a7628c76e1ab866bb9c0893b9a3ca4441702b619dda042
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document also contains a heuristic indicating a lure for command-line execution, suggesting the user is prompted to interact with the system in a way that could lead to payload execution. The presence of a link farm and a redirector suggests an attempt to obscure the final malicious destination.

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/wix?keyword=balena+etcher+linux
    • https://static.usrfiles.com/ugd/dc98cc_14644d4197944703a5606774096d1f61.pdf
    • https://static.usrfiles.com/ugd/0d2908_ed9b5472d6d14037ac7b3c2e56af218e.pdf
    • https://static.usrfiles.com/ugd/e33828_af2be7a0ccaa47a3afe2b4f64f0a1ea6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/katipafituzevix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/24340739594.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/abbayitho_ammayi_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/az_game_and_fish_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/80094789040.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/medoxuvimagadedonalijak.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/mukazodolebub.pdf
    • https://cdn.shopify.com/s/files/1/0434/0429/6348/files/jurekolukopewejuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/66167968132.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/trastornos_alimenticios_ensayo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/ripasso_analisi_logica.pdf
    • https://cdn.shopify.com/s/files/1/0441/0186/1528/files/xigosof.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_off00006d9a.bin
3312be2315cb12dd4538bb4ff392b7f5d3b5621df4c15c71b42fd59c5791a5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 4828 bytes
font_01_sfnt_off00007dfd.bin
8547e2b483cc2896e5c8a7c8ad4c835d7a7bb67f8d838c1eed80551dcd7e503c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 10376 bytes

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