Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c92cfaa6ff36fbf…

MALICIOUS

PDF

44.3 KB Created: 2020-08-29 12:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c73ae017f28ab6d2c59a9ee66bbcb35e SHA-1: 3890b197c43b7370e4bed1ff95d358a4db52667a SHA-256: 0c92cfaa6ff36fbf2bb289eb0c3914337cbb211b8451d753f78662661f895871
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://ttraff.club/wix?keyword=lip+presets+sims+4', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links, many pointing to benign content, indicates a potential link farm or SEO poisoning tactic to obscure the malicious URL.

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.club/wix?keyword=lip+presets+sims+4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a240a907a9754f6ea702dbecf2c09753.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e244c619ba3435db45c11b591767a90.pdf
    • https://static.usrfiles.com/ugd/b8c837_a780bc20d92b42afab37cbdd4a32e390.pdf
    • https://static.usrfiles.com/ugd/b8c837_694db9700031449888a3771616668c3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ebb2b9cc4f49bcb732a2ef894610f3.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/completing_the_square_guided_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/college_of_satire_5e.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/90984407727.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0306/files/50840909418.pdf
    • https://static.usrfiles.com/ugd/b8c837_79498a9681a742d5ad474c77ba802910.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e4350b43ae547118527007f65489b33.pdf
    • https://static.usrfiles.com/ugd/b8c837_d274c9f52c3740d0b0c48013583d06c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ebd400c59e461aac51a34e190e0bb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cb234ad78af4295be5f05ae398bfbc7.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ad3.bin
008ce4516bc17b21cd43385c29cd10603a6343efc69cc1cccda151d58a0f6819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 4752 bytes
font_01_sfnt_off00005ae8.bin
5ccdb7680ff58e53e834e7f5c5c5791cc4960428759c6607f30651109aa11878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE8 3956 bytes
font_02_sfnt_off00006934.bin
eae7f12237fe2a1c4f1f192a4952d2c33ce44f8eb49d12107d7e4ddb1cdbd658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 10604 bytes
font_03_sfnt_off00008dc6.bin
1e4a57d86cffa03b7fdcea9288291f0d77972734071bbbedc3961c1f5eccbb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC6 16424 bytes

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