Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdefbfca790980e…

MALICIOUS

PDF

33.2 KB Created: 2020-08-08 06:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1605691e7b1fc51550215d8ed6a00cfe SHA-1: 8dd5a75a4a21d1da79e94349a3bb820679fb18cf SHA-256: dfdefbfca790980e2be28339a4394623db2f20695af035887f0450841644a2d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary link pointing to a known malicious redirector. This redirector is likely used to obscure the final destination and potentially deliver a malicious payload. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results for phishing purposes.

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=blowing+in+the+wind+guitar+pdf In PDF document text
    • http://files.spectacleeventrentals.com/uploads/1/3/0/7/130775257/menelirado-tavolixusajome.pdfIn PDF document text
    • http://files.graceforthebroken.org/uploads/1/3/1/4/131438073/4274376.pdfIn PDF document text
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdfIn PDF document text
    • http://files.mediabrewers.com/uploads/1/3/2/6/132696506/6417778.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/1/0435/0948/1624/files/horacio_quiroga_el_almohadon_de_plumas_y_otros_cuentos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/js_fetch_post.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/sazafavobozezez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/serenity_prayer_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/vupiwefedugapamuxub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/descargar_libro_caballo_de_troya_4_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/32065828454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/wuwogutofugel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4925/5066/files/zigedixevigixoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5890/files/business_administration_books_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/36066222766.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_off00004608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4608 5264 bytes
SHA-256: 2ce58805edc0f82861c37a8fdf6e31c295fb9264b53554d34ee3a4e8cac0f29d
font_01_sfnt_off00005801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5801 9416 bytes
SHA-256: 090085c7534577e6a16ebbc74f89b791375d3e5ec88d5c7997f1da1afab42f68

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