Malicious PDF — malware analysis report

Static analysis result for SHA-256 8435698e664a3ad8…

MALICIOUS

PDF

49.0 KB Created: 2020-08-06 16:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c22b6238ec919ba21a00e3503d5af20c SHA-1: 66044d331926b80edd92c3671958d6e5f86a4fec SHA-256: 8435698e664a3ad89442f9b1d26c3046e5d90f34f40b4337e89506956f3556fe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to a redirector service known to host malicious content. The document body itself contains a link to this redirector, suggesting a phishing or scam attempt to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=dictionnaire+technique+du+petrole+anglais+francais+pdf In PDF document text
    • http://files.schoolofstpeter.com/uploads/1/3/1/4/131406082/pabaju_zepobem.pdfIn PDF document text
    • http://files.alexherrald.com/uploads/1/3/1/3/131381518/juvoxelazo-gadex-vilukiwe.pdfIn PDF document text
    • http://files.flogrips.com/uploads/1/3/0/7/130775786/3435179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/jagamakanulud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/56117992671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/25255400016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/tosulofiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/66780303435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/tokisebufafubevalenalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8954/files/kilemenurog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/fatelutimadexuvofesotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/72503445148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/92300116349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/multivariable_calculus_concepts_and_contexts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/alimentos_con_alto_contenido_de_carbohidratos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/delubavab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.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_off00006df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 4236 bytes
SHA-256: 12a0bfb1200b9aa31b29be246776753bcb930609a734e45f5eafb749cec24a67
font_01_sfnt_off00007cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEF 5540 bytes
SHA-256: b68761c1d6912e8e05b63ff0a4ca145290c55671584c23edeb97324b6ec06709
font_02_sfnt_off00008fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBC 11440 bytes
SHA-256: ce045bca171548d19afb4f18226acda2ec567422e94d105f99bd3aeb411022ee