Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6afa9669b7bc3a…

MALICIOUS

PDF

67.9 KB Created: 2020-10-21 06:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-17
MD5: d1fb23a7a0e1768ee7e3b203ac073aad SHA-1: e8f934ad24991879557f921244a24da96fb22191 SHA-256: 2b6afa9669b7bc3a54a1e7f8cf3b4673903b31ea739a80db5845d6bd4ee3e18c
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=learn+korean+numbers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f8f0220d71ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f870045a4abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f88d7527809a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f88672ee5a05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f8f75a00de40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/58932034354.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ap_biology_campbell_test_bank.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/english_active_and_passive_voice_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0283c6b-3330-4896-a172-882b55be670c/kupixibazezipuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6072fb-3581-4381-a513-546bbaee9a20/40981525326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9280/files/83736624984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7768/0280/files/tegudobawose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6386/8573/files/download_test_dpc_5.1_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/husky_2600_psi_pressure_washer_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0114/7302/files/large_biomes_minecraft_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3136/4252/files/6517170752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4721/5000/files/28151100592.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_off0000b291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB291 7968 bytes
SHA-256: 4452a08ab77ad406a39fc1aac6848ad239a767efa8580105b7ecbc069310f0ec
font_01_sfnt_off0000cd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD31 5300 bytes
SHA-256: dcdc45d577a065a990c3ad63670e017bb9ed5e8d2a63b3c503c1c94ba41e4d73
font_02_sfnt_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 10148 bytes
SHA-256: 04608519f5dd4173940e244cbd973b29e344ddfd5687a8601d8386fd49e2a82f

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