Malicious PDF — malware analysis report

Static analysis result for SHA-256 1663de34728d7579…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 06:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f7f0c8a36af1df9f67943251ee70670 SHA-1: 5fe813c04dccbfc4aed2192ffc878856c14c0dfc SHA-256: 1663de34728d7579c19d6fcc3893d58b4606112d9c22c697a093b92d7b69da51
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a recipe, suggesting a social engineering tactic. 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.com/pify?keyword=butter+chicken+recipe+in+malayalam+pdf In PDF document text
    • http://sitowel.gbtransplantcycling.com/uploads/1/3/2/6/132682076/vowupuw.pdfIn PDF document text
    • http://files.104brilliant.com/uploads/1/3/0/9/130969645/4666279.pdfIn PDF document text
    • http://files.southshoredanceacademy.com/uploads/1/3/0/7/130740391/netevefumaxez.pdfIn PDF document text
    • http://files.ulcel.org/uploads/1/3/1/4/131483386/5441442.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/1/0434/4040/6684/files/38248544755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/minecraft_server_pe_hunger_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4741/8016/files/anglo_american_literature_grade_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/razos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/22950977518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/the_idea_of_the_world_bernardo_kastrup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8519/3625/files/28146684335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/32527754718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/xonifuvojub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9925/9031/files/12901219995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/bunog.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 4

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_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 5204 bytes
SHA-256: f2c09893f5b13cde8367f1a6cc5e4ac69e5ff031f52f59b10bdaf1a7629f8bff
font_01_sfnt_off00007452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10080 bytes
SHA-256: c407b22887cdf2fa99cf61fe93fbbe202c962f7b0d6d476dd0be144116ffaae5
font_02_sfnt_off000096bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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