Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8721f975e0294d…

MALICIOUS

PDF

45.0 KB Created: 2020-10-09 16:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: d9c4608dc7faaf3799606ebcecc230a4 SHA-1: 0117043138a7ac544a0bbfdf6e3dc1de6a71363c SHA-256: aa8721f975e0294d77e44ae28c17b90ba727f26dca85d87b35ef53a4017867f8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=how+to+schedule+a+meeting+in+outlook+365 In PDF document text
    • http://files.rurichlab.com/uploads/1/3/2/6/132681787/3354834.pdfIn PDF document text
    • http://files.dessauband.com/uploads/1/3/2/6/132682565/texidonirunu_setem_webolikedazib.pdfIn PDF document text
    • http://wesin.coramakes.com/uploads/1/3/2/7/132740478/98a36b9763.pdfIn PDF document text
    • http://files.alexanderecology.com/uploads/1/3/0/8/130874647/7820649.pdfIn PDF document text
    • http://rudari.fronhoferlab.net/uploads/1/3/1/4/131482952/tukovefoxek.pdfIn PDF document text
    • https://site-1038531.mozfiles.com/files/1038531/17255725942.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/karunefim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/59848195176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/2602605136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5386/6919/files/encyclopedia_brown_boy_detective_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5973/5447/files/extended_essay_abstract_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/49025284305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0184/2344/files/cbc_with_manual_differential_bands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0083/4466/files/ratio_test_convergence_proof.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5700 bytes
SHA-256: e4550f208c6a823df787506f16092352bfd3e2729cfd9c16af65eb98576b68f0
font_01_sfnt_off0000767d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 9996 bytes
SHA-256: d487e24295a11cdeae98d81df1e51a7b95d8f2b8b6d7c926d0fd5a674a6aa5e3
font_02_sfnt_off000098a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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