Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42039faf8c11b4d…

MALICIOUS

PDF

47.7 KB Created: 2020-10-30 14:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d34666b5247e28abb1730c3a6c4225f SHA-1: 7bcfdf7bc6009aeb6f9c44bfbcee42dc68beb1fa SHA-256: b42039faf8c11b4d48319fc03dcbdc8fd5ed2368b0475326781e24b6f18a5dea
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ggtraff.ru' which is flagged as a malicious redirector, likely serving as a lure for malware or phishing. The document also functions as a link farm, hosting numerous other PDF links, suggesting an attempt to manipulate search engine results or distribute content. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful sites.

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://ggtraff.ru/strik?keyword=call+of+duty+black+ops+zombies+apk+1.0-5+download
    • https://cdn-cms.f-static.net/uploads/4383460/normal_5f8ba02a16c98.pdf
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f87012143fb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0500/7730/2933/files/libros_de_teologia_biblica.pdf
    • https://s3.amazonaws.com/fasanag/alphabet_writing_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0504/6848/7363/files/bipizesegopulalofuv.pdf
    • https://s3.amazonaws.com/gezetega/silewawoxabowixixotal.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/31442887486.pdf
    • https://cdn.shopify.com/s/files/1/0461/3170/8072/files/punjab_board_chemistry_book_12.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/isekai_nonbiri_nouka_novel.pdf
    • https://s3.amazonaws.com/tuxutedi/agile_test_strategy_example.pdf
    • https://s3.amazonaws.com/dedinavesute/12547513368.pdf
    • https://s3.amazonaws.com/potofaw/jikopabu.pdf
    • https://s3.amazonaws.com/henghuili-files/fsc_biology_book_1.pdf
    • https://s3.amazonaws.com/donake/54629531809.pdf
    • https://s3.amazonaws.com/sinadi/propiedades_de_la_moringa.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_off000068be.bin
48e46fb0fbcebcf442410ad412fad38e45797d77988fe58253db51a269abcab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BE 5940 bytes
font_01_sfnt_off00007d19.bin
3cbe80b496f5ece9c22321319bcd11d6f97a79ab347936e345f9f133d9889798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D19 11288 bytes
font_02_sfnt_off0000a3ac.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AC 4324 bytes

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