Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65162310b35778b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 03:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026f4036c5aaea3eacd4cad70fa830d8 SHA-1: 5509e2c91e1f0d12cfedbfdb93ed38fc5282879f SHA-256: e65162310b35778b71950358e6de30d3ed5bf8ac74409f7e840419ed7cc020ac
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Us constitution crossword puzzles' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains, but the primary malicious intent appears to be the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=us+constitution+crossword+puzzles+advanced+1
    • https://static.usrfiles.com/ugd/b8c837_3853946d01894217bf58c5ea9bbbd60f.pdf
    • https://static.usrfiles.com/ugd/aef5b7_95633d98c97d468f8b92ef5f08982eb0.pdf
    • https://static.usrfiles.com/ugd/0df15e_ab39b8caa9cb4f35b251f3f387a38f11.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/13054776160.pdf
    • https://cdn.shopify.com/s/files/1/0435/5434/1025/files/xenelobikawifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/kubopivizet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/infinitesimal_canonical_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/national_achievement_test_reviewer_for_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/42832201340.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/nofukakisirap.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/maintenance_of_air_conditioning_system.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_off00005dc8.bin
7a50f835f055d0b60996e8e71bee5720c1ffe648beeda300278e9b006f9e92a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC8 5196 bytes
font_01_sfnt_off00006f9b.bin
d92dd6469536d17cc57aba464c2b17556c7bc3711a8e654c869989d8607e6b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 10212 bytes
font_02_sfnt_off00009285.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9285 4324 bytes

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