Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ff5535e17452e9…

MALICIOUS

PDF

74.2 KB Created: 2020-08-30 22:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fff9b198802a3ee75fcdfc519c413d79 SHA-1: dabf27adc758f6599edd969ee0175853cc673542 SHA-256: b3ff5535e17452e9e663dcdf5119c513bad6d21cc51e2cf92ff96819945520cd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/wix?keyword=brookstone+projection+clock+temperature, is flagged as a malicious redirector. The document body itself is largely unreadable binary data, but the presence of the malicious link strongly suggests a phishing or malware delivery attempt.

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=brookstone+projection+clock+temperature
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/97380277298.pdf
    • https://cdn.shopify.com/s/files/1/0445/6369/3732/files/barycentre_terminale.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/72413876427.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/the_canterbury_tales_translation.pdf
    • https://cdn.shopify.com/s/files/1/0439/0433/6027/files/medical_termination_of_pregnancy_1971.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
    • https://static.usrfiles.com/ugd/c7a620_5b2c89372b4f44169fd10ef0b564d97b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fb9aedc51804b0da9bd5ac73ec33ef4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f47abcdb9904945a9c1c2bf44638d6d.pdf
    • https://static.usrfiles.com/ugd/a107db_eff3200d2e704a8dad60c6fb8d717122.pdf
    • https://static.usrfiles.com/ugd/b8c837_89cc82cb06bd47df83cc7842ad9e5c91.pdf
    • https://static.usrfiles.com/ugd/ac51ce_7d8b063ba0d441acbd3bd5a33c42bf75.pdf
    • https://static.usrfiles.com/ugd/4b7290_00fa2f5c1f81451aa3230ed8c575a1ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_74bb2663d9cb403eb3fe8429e93bcb92.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_off0000cade.bin
154f8cffcc7e432550d9d456ca06357967b3cf2bebaee21e3bb904673a4be1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADE 5152 bytes
font_01_sfnt_off0000dc4c.bin
45e4ee5376ce795367888dc5bec8ccfba91c8dabf2c53251c95c4047c75a0d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 15868 bytes
font_02_sfnt_off00010da0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA0 4324 bytes

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