Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e61410c46883208…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 02:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 051edffbfa42a9418caff425c6f0fd2d SHA-1: a6d24ad919531ead913b9c152b52907376d11fd7 SHA-256: 7e61410c468832085558ec243406cea387581c126b11d5fddc90643c22bf9f4d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'baby proofing checklist'. The presence of many external PDF links, including one pointing to a malicious redirector, indicates an attempt to drive traffic to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=baby+proofing+checklist+pdf
    • http://files.nsghs-ogu.com/uploads/1/3/2/6/132681342/roneruximiwozavimal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/xulaxelesosetuluvotema.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/jojuvafanupekido.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/19450214238.pdf
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/zoxibuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/equidad_de_genero_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/vesoninirago.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/kofinebazav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/xevawogijulopipulawevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/fugonumu.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_off00005d61.bin
78a7c0052e45c17f355215116fc3390d3fc072ebf3ca65d128ca29fa36d070c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D61 5772 bytes
font_01_sfnt_off000070f6.bin
7ff4e8cec89d4d4fc88263e3d5c7e602584b049ae43512d1e577d86d3f7e3250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F6 9500 bytes

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