Malicious PDF — malware analysis report

Static analysis result for SHA-256 26611951cc1bacdc…

MALICIOUS

PDF

38.0 KB Created: 2020-08-24 23:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c1a68f6f93de49c44db4890426e6230 SHA-1: 353f1cce8ce610d8dc8274f634778ed5601b3bb3 SHA-256: 26611951cc1bacdc1cdce58ee280f180b7f1dbbf4df4053c6614f9a6b128a8e1
120 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous external PDFs, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector. This suggests the document's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of the exact payload.

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.cc/pify?keyword=word+game+answer+4+letters
    • http://fusip.nataljaaicardi.com/uploads/1/3/2/6/132683097/4a30a2.pdf
    • http://nipumo.deutsches-haus-sonthofen.de/uploads/1/3/1/1/131164250/374003.pdf
    • http://files.gracefulbeginnings.ca/uploads/1/3/1/1/131164076/18651bad.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/kalixotupojikivajoxute.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/management_of_asystole_in_acls_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/nokokugeda.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/32583569082.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2823/files/spanish_reading_comprehension_worksheets_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/go_build_command.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/56006264214.pdf
    • https://cdn.shopify.com/s/files/1/0433/0120/8232/files/64220682300.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/samsung_bypass_7._0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/scratch_2_game_project.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_off00005720.bin
70f91a42ef48bc4d14fb403e420fa2f87c244b936dbaa7b926921357fc8f9ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5720 5336 bytes
font_01_sfnt_off00006953.bin
f6f1a8e2bd0a765d6487e2db6117f430fd64ef0efb065d09aa79c3b6b4ed2723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6953 10024 bytes

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