Malicious PDF — malware analysis report

Static analysis result for SHA-256 78210399a8f04c46…

MALICIOUS

PDF

45.8 KB Created: 2020-08-20 05:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85595f72751ab0ba925ba11c6c5c7415 SHA-1: f3a97d2756c307ce6dcdaca8955a1650e5d09e31 SHA-256: 78210399a8f04c463abe29ff37a2e12019fd1bcbcae33c8ed3d33da8a07834c0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service known for malicious activity. The document body, though heavily obfuscated, includes a URL that is also present in the heuristics, indicating a likely attempt to direct users to malicious infrastructure under the guise of a 'Japanese food guide book'. The ML classifier strongly supports the malicious verdict.

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=japanese+food+guide+book In PDF document text
    • http://files.chirho.consulting/uploads/1/3/1/1/131164440/tozage.pdfIn PDF document text
    • http://files.mommygeekmg.com/uploads/1/3/0/7/130775201/zomomuwogudos_mubetidajageko_kokoragaf_sokapujivovesu.pdfIn PDF document text
    • http://vixaxenab.kkphotography.com/uploads/1/3/1/6/131606782/lagolux-ruwadisunu-vapobewor-kimot.pdfIn PDF document text
    • http://files.teresamunn.com/uploads/1/3/1/8/131856446/8e3b13495.pdfIn PDF document text
    • http://momix.sijschool.org/uploads/1/3/2/6/132682694/7131467.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/1/0433/5609/4615/files/7344154178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4745/0774/files/paraphrasing_exercises_ielts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/pokemon_blue_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/lunijinoxasibomiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/rigin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/gunuvuruvoxerinuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/bloodborne_executioner_gloves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8559/8615/files/oxalates_in_foods.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_off00006931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 5076 bytes
SHA-256: 089401b64bfc5d1e4376225f85eb79963c867b853a37d839bcefb1d20c2b5269
font_01_sfnt_off00007a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 9940 bytes
SHA-256: ff2c424a17a9531e5377c1538ad74bc72444f482fbf878d941276ea2ad084ea2
font_02_sfnt_off00009c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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