Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad52e14746a4ea4…

MALICIOUS

PDF

52.6 KB Created: 2020-08-29 17:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23006cbb13cc07e087ac70f72d7e3f6f SHA-1: 0f412e88c2d37a02e8c46c69a4ec7b6a12e1ea4a SHA-256: 6ad52e14746a4ea4da0e27ca232b28317f489c46f93646807646c2be1f5dc00e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://ttraff.ru/wix?keyword=dnd+5e+witcher, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links were generated, likely to obscure the malicious destination. No scripts were extracted, but the presence of malicious links points to a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=dnd+5e+witcher
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/69954900919.pdf
    • https://cdn.shopify.com/s/files/1/0435/0718/7872/files/foxaxafufozilodanebulob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/theurgy_wizard_5e.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/84697573105.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/25443748650.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/44541816202.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/limatiluledulutulegol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/21510427600.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c51e567f8ce48589556a5b611c7be17.pdf
    • https://static.usrfiles.com/ugd/b8c837_33577a52336a415ea93165f1e69288e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b680fbf460504cafb5037c88a2e77bf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e6aea36c5cd4d009ef0b9ffa9e8055f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6fcd700eebb499b9929fa7e1b0e3f17.pdf
    • https://static.usrfiles.com/ugd/b8c837_53e8f6c744ad4c91b07e0a08e93016c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c071499630f4da8a037e399882d5f86.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084ac.bin
0609076b2871e9d88c6becb9546308422c571f309121161b72905facf6234fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AC 4500 bytes
font_01_sfnt_off000093fb.bin
6dedf65d912325a3ea5a8a72aa652333a39697f47cd5ac5657d3e22f2d841cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93FB 10504 bytes
font_02_sfnt_off0000b7a9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A9 4324 bytes

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