Malicious PDF — malware analysis report

Static analysis result for SHA-256 52642bfb9f5fdcaa…

MALICIOUS

PDF

44.0 KB Created: 2020-08-08 13:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0779dba69f5cfd7545078fa66f94bb2d SHA-1: 35eace7597bd191e2ee187c16aae55a6415a42bc SHA-256: 52642bfb9f5fdcaa7ac35a981c80f0ed53a098e71d0940bf95d837d3a7620338
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=enuresis+y+encopresis+infantil+pdf In PDF document text
    • http://files.foreveryseason.net/uploads/1/3/1/3/131380641/zobijubuwafadopeki.pdfIn PDF document text
    • http://files.flytimesdc.com/uploads/1/3/0/7/130738848/bivuretujino.pdfIn PDF document text
    • http://files.asapa.info/uploads/1/3/0/7/130739519/wujumutikusezumeti.pdfIn PDF document text
    • http://jebuvexef.quranicframework.com/uploads/1/3/2/7/132740873/xazugimakeximufeje.pdfIn PDF document text
    • http://files.anniepaquetteart.com/uploads/1/3/1/4/131437632/9459559.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/1/0428/4016/2467/files/54388057391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/wuridesurefatal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/kizaviruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/diesel_mechanic_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/76763430772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/munaripudopagilud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9565/0457/files/61084210195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/nizomixole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/15_minute_timer_bomb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/ludozonedigem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/misoxonoselegoxilu.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 7

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_off00006eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 5208 bytes
SHA-256: b1dae98b1771f104f4cbb990b6f452ae08883a224b3d586de8b7385d4f204e5b
font_01_sfnt_off0000808d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 10280 bytes
SHA-256: 0f59a3a92f864c0164990d891701f627769173c8567ded68e898017328d5a673

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