Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f816888f66e981…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 06:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f0fd7c1d41c54a739520d575f7bc7e7 SHA-1: 6b970ad5bd6759c4fd2920e7d063cf4725f9c359 SHA-256: 70f816888f66e98148464c7fcb8155a5c4a2a91ceb9ad7191384895c98c4f61f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, 'https://ttraff.ru/pify?keyword=caracteristicas+del+modelo+neoliberal+pdf', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and a large number of other URLs, suggesting a link farm designed to redirect users to potentially harmful content.

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=caracteristicas+del+modelo+neoliberal+pdf
    • http://pesegej.roosterdeli.com/uploads/1/3/1/6/131637047/7496012.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9613/6097/files/numerical_ability_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0894/1467/files/additive_manufacturing_journal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/cisco_catalyst_3650_24_port_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/apache_web_server_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18813115042.pdf
    • https://cdn.shopify.com/s/files/1/0430/8346/4855/files/57927208742.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/voxoripisukugetipewolil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/82211731947.pdf
    • https://cdn.shopify.com/s/files/1/0439/6980/6494/files/wings_of_fire_book_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/15963966321.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0802/files/pandas_drop_rows.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_off000066b2.bin
42fcc921194121919ffbda7ff5b4e6942ef9202311b89b9ca7d8b7efe939b05e
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B2 5344 bytes
font_01_sfnt_off000078bf.bin
47706d2126a862f1678188fcb19ebd31b1999dd2831053e60a04bf7f78375703
pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 10656 bytes