Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ba7b1dc007491c…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 21:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 449484654928154ea70e9b8342b163c4 SHA-1: 41de66c91078c8adac462d869728fa6ce71c7af4 SHA-256: b9ba7b1dc007491c770589996499ea61225e7d54262c7c17b81bb3d17702bf6a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reconstructed URL pointing to a redirector. This suggests the primary purpose is to redirect the user to malicious content, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.com/pify?keyword=thinking+and+problem+solving+in+psychology+pdf In PDF document text
    • http://files.keydestinationevents.com/uploads/1/3/0/7/130776407/nunozowobawupax.pdfIn PDF document text
    • http://files.oubta.org/uploads/1/3/0/9/130969974/rupomoteruveg.pdfIn PDF document text
    • http://files.brokenrailranch.com/uploads/1/3/0/9/130968917/jadipoxejariwediwa.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/1/0428/5962/6655/files/40569453903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7887/7337/files/jdf_1111-_ss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/bafukurotubuxusaluvufos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/ichigo_vs_aizen_episode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/statistical_methods_for_research_workers_fisher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8882/8829/files/gameboy_startup_sound.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/34173290245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/etat_de_rapprochement_bancaire_cours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3419/8684/files/they_might_be_giants_hot_dog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/pisoladelatodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/aviation_week_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/scholarship_essay_examples_financial_need.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 5592 bytes
SHA-256: 4b27e7d28939d65bb08a905843ea8fe9e2cdced931229e51fc8dcfa936852a7f
font_01_sfnt_off000083a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 12356 bytes
SHA-256: a2321eeb1142c34f31eff420cf45f785265c30075125cd9f847b24687cb65674
font_02_sfnt_off0000ab3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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