Malicious PDF — malware analysis report

Static analysis result for SHA-256 854a1bde090a2da2…

MALICIOUS

PDF

43.4 KB Created: 2020-08-02 13:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91170273a315b0e2e8af1ce5afab2608 SHA-1: 689e6cc2e050795f462cab9113b65e7ca33247d4 SHA-256: 854a1bde090a2da23313aeefb3b081ca223fa2f0ee2ed9b6cd4e9a78be185230
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service known for hosting malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Mythic Nythendra guide'. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages. The ML classifier strongly indicates 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.cc/pify?keyword=mythic+nythendra+guide In PDF document text
    • http://files.seldomsky.com/uploads/1/3/2/3/132303126/2c6109fa42baa.pdfIn PDF document text
    • http://files.mljanderson.org/uploads/1/3/0/7/130775980/6a668561.pdfIn PDF document text
    • http://files.gertrudekatzchronicles.com/uploads/1/3/1/3/131379510/8219617.pdfIn PDF document text
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdfIn PDF document text
    • http://files.ots-adventures.com/uploads/1/3/1/4/131437987/buvebibojudifol-befinananaj-xirej-lefano.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/1/0432/1234/1416/files/kabasikuruxexopupakav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/54057041656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9179/5875/files/84910631221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/36989936826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/guwevaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/57186042990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/47391516374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/xujifezapulesudarisis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/nuxedofamogakazala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/90165351755.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C19 5096 bytes
SHA-256: c22430657f082eefcfdf2e74a112c80c54c54bb07d9208adfe13dd0807ccdb9c
font_01_sfnt_off00007d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 10496 bytes
SHA-256: 47b57fc476731f5c5ce6da1e6d56e3da619712c87c76d494ef4979e7a39d0c77

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