Malicious PDF — malware analysis report

Static analysis result for SHA-256 692755a3d6a7595d…

MALICIOUS

PDF

72.4 KB Created: 2020-08-19 16:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b835aab39e6093bb4e9ffa06054b7d75 SHA-1: 637d60d7524a443179ddaea8d9f3194aaf00d15c SHA-256: 692755a3d6a7595d978bdeb7cde2e5754683018b9b8380d548403fe0fef9b3a5
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links to other PDF documents, a technique often used for SEO manipulation or to host malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=championship+manager+season+01+02+free', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure suggests an attempt to lure users or manipulate search results.

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/pify?keyword=championship+manager+season+01+02+free
    • http://files.businessmanagementorganizer.com/uploads/1/3/0/7/130740127/57d8c.pdf
    • http://files.englishkb.com/uploads/1/3/0/8/130874192/7863734.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6258/2693/files/45018987535.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/classic_dungeons_level_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/sheikh_abdul_qadir_jilani_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/9986973759.pdf
    • https://cdn.shopify.com/s/files/1/0432/2305/6545/files/zapazovapedewejefuzagas.pdf
    • https://cdn.shopify.com/s/files/1/0439/2439/0056/files/wipebuvuroxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/bayesian_data_analysis_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/zewuverufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/maminowovuwidivav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/50485725653.pdf
    • https://cdn.shopify.com/s/files/1/0430/4073/5381/files/xegavokoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/sociolinguistics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/dvt_management_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/emerald_tablets_of_hermes_trismegistus.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_off0000c5ee.bin
baf51c5a05fae942d6606098d8be801d13e1de7bd14207cbb7ed6c26db60de6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EE 5516 bytes
font_01_sfnt_off0000d890.bin
41c9b945a4d090f46f52e088812c438bdc6f41283adf1c168b58722bc24da960		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD890 11220 bytes
font_02_sfnt_off0000ff20.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 16164 bytes

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