Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16e7574a789569f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 00:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de2c378c1f69de0f1c2f2f03405d912 SHA-1: ec59bf7afa35888bef285a8da413b0373f34149d SHA-256: a16e7574a789569fbbe78a6bc3380edc030acbf42b0e2e0e70625be6e55daff9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=composite+area+and+perimeter+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://static.usrfiles.com/ugd/ac51ce_ffcfe445dbb54aeab4500208a463a191.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting a lure to external malicious content.

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=composite+area+and+perimeter+worksheet
    • https://static.usrfiles.com/ugd/ac51ce_ffcfe445dbb54aeab4500208a463a191.pdf
    • https://static.usrfiles.com/ugd/b8c837_df087bd10e5f419e8aa4f439edae7421.pdf
    • https://static.usrfiles.com/ugd/7ff653_c0c13e97211f4e22a5c4d4b1a4a21e53.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/zoguwisomopaborufud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/sinapogokazazisilozidopa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/70851069057.pdf
    • https://cdn.shopify.com/s/files/1/0440/5084/1750/files/dbz_bio_android_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/ppt_background_themes_free_2015.pdf
    • https://static.usrfiles.com/ugd/2813e2_e33e51889d894d7eb16fdc259895c4f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f08c09417a4dd1b0fbff13dde06744.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_off000068e1.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E1 2828 bytes
font_01_sfnt_off000072dc.bin
204b70840a5393289d87e0be0f6a9b93ca5155dd219983ca27d86e0ea4a3dd29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 5228 bytes
font_02_sfnt_off0000847f.bin
ae25e758830740a2d27e4a9e774d6177b3b2069830f41824be52a0c67756eea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 9700 bytes

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