Malicious PDF — malware analysis report

Static analysis result for SHA-256 646de397494e9785…

MALICIOUS

PDF

58.5 KB Created: 2020-09-17 08:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 010483dba1f38f9794153ebafc43d573 SHA-1: dff11e95f70437876385e2bd605d261754917f8d SHA-256: 646de397494e9785549587bb8de1555ace29f00e9dda818b207d839e418db387
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final destination. The heuristic firings indicate these links are associated with malicious redirectors and SEO-based phishing lures. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics, suggesting the primary purpose is to drive traffic to malicious sites.

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://ttraff.me/wix?keyword=pure+substance+vs+mixture+worksheet+pdf In PDF document text
    • http://gazoberu.grand-boats.co.uk/uploads/1/3/0/8/130813765/vovezozibumatiwu.pdfIn PDF document text
    • http://nuxaduw.nybellhouse.com/uploads/1/3/2/7/132710621/filatu.pdfIn PDF document text
    • http://jetutu.store.advantageauburn.com/uploads/1/3/0/7/130740522/5457005.pdfIn PDF document text
    • http://files.lama-lab.com/uploads/1/3/2/6/132695698/970bdbed5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26a5903f-f8c4-40d1-a441-c87f5d6c6609.filesusr.com/ugd/54e393_59f2379daced474299ce73a0cded534e.pdf?index=trueIn PDF document text
    • https://cd3ae886-33b5-451e-8989-7ed3922c1a43.filesusr.com/ugd/e2c223_0874607b626f415c9be9f5e56785344e.pdf?index=trueIn PDF document text
    • https://e48d9dd0-7304-485d-a9b0-a2336bce3f70.filesusr.com/ugd/c722c2_389480fa82354d25aa75d379c3ece758.pdf?index=trueIn PDF document text
    • https://9d4365de-6f89-4c72-9986-ba665cc3e689.filesusr.com/ugd/9e41f0_0d6854c1fee54f0c92ba782bf6a61a9a.pdf?index=trueIn PDF document text
    • https://43277db8-aaf7-4cff-8bd8-45ff0fe14fc9.filesusr.com/ugd/accd1f_779f30a1ab6141a581a282a42cb8e186.pdf?index=trueIn PDF document text
    • https://c62c6b83-2577-4b3a-ab43-2b15133d835d.filesusr.com/ugd/cf9ff1_91909e48e6b34cb0b494a377c301dafd.pdf?index=trueIn PDF document text
    • https://154c2848-fda4-4554-9897-5b2054a172bf.filesusr.com/ugd/d6af85_fc13a69092fe43ad9ca1c65305238b4b.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6712/1565/files/69690338650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6886/9019/files/pizonoberalazidagukuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/antecedentes_historicos_de_la_administracion_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/sugowitewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/69429206243.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_off00009bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAD 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000a5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A8 5788 bytes
SHA-256: b186c96b41c74ab269e74008d870fdb9dafd62a14967f03453c4c1f2d155aef5
font_02_sfnt_off0000b944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB944 9812 bytes
SHA-256: da05e9d2a7418ae8c3762dbc81d400d7be0641f0312fc1585da3278af5c7d5bb