Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a6b68e7027e066…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 15:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c66ecc0e99e1cbbd2d4c45f1020e6c98 SHA-1: a4bb4a8ad92728087df7a0aab77b1f8d94d9dd2e SHA-256: 65a6b68e7027e06650db1ccc81cedc80acffe03b01d63569d96ca480a8b81704
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains multiple embedded links. One of these links, 'https://ttraff.ru/wix?keyword=camille+paglia+provocations+pdf', points to known malicious redirector infrastructure. The document also exhibits characteristics of a PDF link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or direct users to potentially harmful content. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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=camille+paglia+provocations+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_12eb73f1113a465d906497cf408704f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_528edf90f4e54b988b0956dccf9e278c.pdf
    • https://static.usrfiles.com/ugd/173616_79b999f276894600819528683293cd0a.pdf
    • https://static.usrfiles.com/ugd/fd3290_c0f40fd7a9a34ef98a47137b480ec147.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_2bce81640cde483bac4e8afb4158d385.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/bible_audiobook_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/jopomodekuvudevavov.pdf
    • https://static.usrfiles.com/ugd/b8c837_f49eabad86f048a197efaeb994fdb866.pdf
    • https://static.usrfiles.com/ugd/b48b60_21563d98c83f469ca9eb3254c998ee8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_63f03e14d82443f094a9e04d2b651b2a.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/chuyn_t_file_thnh_file_nh.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4647/files/ibps_clerk_preparation_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/wasosezujowodododi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b62.bin
7f5327329fc07a5f3f2fa4d977203c8036f825779a7e58de9ceba388c9a83973
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B62 5440 bytes
font_01_sfnt_off00006dd9.bin
a5184ddea39acb47a33f8cf2ad6bd42dfa7e368a7f8cd2823edbb707af700cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 10020 bytes