Malicious PDF — malware analysis report

Static analysis result for SHA-256 632b54c9a9f569a4…

MALICIOUS

PDF

54.0 KB Created: 2020-08-30 10:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53c8cb5a20b1f0d8aa4ea6b3f2a42b01 SHA-1: 3c137f06a2022a3ff0e93a38a1e56ae999d441e4 SHA-256: 632b54c9a9f569a4cf40094212f93d19fef5c915358f8bda6837ec01fdbe2976
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.com/wix?keyword=legendary+game+of+heroes+relic+guide, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a game guide and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links further indicates a link farm or redirection strategy.

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.com/wix?keyword=legendary+game+of+heroes+relic+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0d2908_cab918ce3afb429398be817742aac32f.pdf
    • https://static.usrfiles.com/ugd/b8c837_53e8f6c744ad4c91b07e0a08e93016c5.pdf
    • https://static.usrfiles.com/ugd/704566_241fad149d3a47d1bc5b90d214169b3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f28915aefff245bcae49073376a60597.pdf
    • https://static.usrfiles.com/ugd/9b5f63_cc71d3c468034cd5bceb0a156c914e32.pdf
    • https://static.usrfiles.com/ugd/74c34a_88e1a157c6c3468ba1d616bd969a0369.pdf
    • https://static.usrfiles.com/ugd/b8c837_854ccda3cc304d0586db2b2da9a270c3.pdf
    • https://static.usrfiles.com/ugd/73cb9e_311f499e54804819afb55916ea39d9b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_986d6d3f0bde48f389dc74c1d2969c71.pdf
    • https://static.usrfiles.com/ugd/61b8bf_2b58497769eb4d98ac2b02cbfa74d908.pdf
    • https://static.usrfiles.com/ugd/097bd5_072f11f2bda040d69022c6d43a78e50a.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/bbc_english_book_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/advanced_cardiovascular_life_support_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0430/4407/7722/files/disuvivazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/88151757520.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f52.bin
a3f8952f70d577890fba479dc4cf563e9ec3a85fc8c5a61f2f1c6ed6d1c218f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F52 5476 bytes
font_01_sfnt_off000091d3.bin
87d41dd7bc2553099e962ebadcf13fb3df39f2b77394986d211bd6581dfc3413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D3 10708 bytes
font_02_sfnt_off0000b60c.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB60C 16092 bytes

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