Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54540276d4fd0ba…

MALICIOUS

PDF

40.4 KB Created: 2020-09-08 20:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 565d8312cba1ea1922b792acbbf3bf2a SHA-1: 96dfb2d1ab381418d37514d267f42caf4d527b1a SHA-256: b54540276d4fd0ba823771dd0e9846813a8f51ac0414695ece9c91301150569d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=estimating+differences+worksheets+3rd+grade'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, identified as a PDF link farm, which is a common tactic to obscure malicious intent and distribute malware or conduct phishing. The document body, though partially corrupted, contains text related to 'Estimating differences worksheets 3rd grade' and the malicious URL, suggesting a lure to disguise the malicious activity.

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.link/wix?keyword=estimating+differences+worksheets+3rd+grade
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/88365766057.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/92589016198.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/34543466441.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9068/files/39399490583.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/letajejiliniwugur.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/62959030923.pdf
    • https://static.usrfiles.com/ugd/67f5f7_bc37a29b56c241a98c00c80f5aaa8101.pdf
    • https://static.usrfiles.com/ugd/9e41f0_1623e412b3e64a429c3bd61447a78848.pdf
    • https://static.usrfiles.com/ugd/60933b_6cd1f81bc4184c57a1058581d2c672aa.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/bilaspur_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/nenafiginuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/23387886445.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_off00005348.bin
ae7042bfd3bec18f5736a47f042eb0e608da8827e731dd0c22811ef33c2b6c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5348 5468 bytes
font_01_sfnt_off000065c9.bin
f7373dc2958d979059fb6b9fab56815f2ee38705b6c3035346ff291019eb22cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 9584 bytes
font_02_sfnt_off000086a8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 4324 bytes

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