Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8d14c292a3f8fd…

MALICIOUS

PDF

37.5 KB Created: 2020-09-01 08:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be2982e818c6411a36ad2a570cca4cd SHA-1: 0d60184834da6273b4880d296a6aec0d8b1f27f7 SHA-256: da8d14c292a3f8fd0817975798de7af1f87ac081e48608be9a38cd907e3ca623
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'Phet simulations forces and motion worksheet', suggesting a lure to attract users to click the malicious link. The presence of a link farm heuristic further indicates an attempt to distribute malicious content through numerous links.

Heuristics 3

  • 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.
  • 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=phet+simulations+forces+and+motion+worksheet
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/74547037847.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/josogim.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/sotexurate.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/37265980280.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/18607995222.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/amides_and_amines.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/free_advertising_templates_for_photographers.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/jspdf_autotable_styles.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/mehendi_design_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2893/0979/files/anemia_falciforme_2020.pdf
    • https://static.usrfiles.com/ugd/ae059d_fab90669873f4f77b43ec6c64bf88641.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_d36d83677861415a84ad610412e33cba.pdf
    • https://static.usrfiles.com/ugd/b8c837_893b824729e540a7a7df4385467bf7b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c241bf2bd904e6089d9dccdb7324562.pdf
    • https://static.usrfiles.com/ugd/253000_dc110ce8bbfe4cc0a8b8e7debd65db6a.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_off00005348.bin
f88778447356e81e1d0d60d84a4a872eb43a74c74b72e5931b2e8ddbec2e8c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5348 5416 bytes
font_01_sfnt_off0000659c.bin
3225447f00bdb268b3642bfa8903765ee463e7e1713654ffaf0894147ba774f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 10296 bytes

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