Malicious PDF — malware analysis report

Static analysis result for SHA-256 1345bdeaaa83c3ae…

MALICIOUS

PDF

67.5 KB Created: 2020-08-03 17:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20138b17efd88ad208a02ebd5c1f74df SHA-1: 4d3250918edc4afb3f648143ed6d5c4bd7d665fb SHA-256: 1345bdeaaa83c3ae7d262126f61a1b26c313eec05b879df978a8b9f2feda4b80
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded URL and the document body text point to a lure that redirects users to a malicious site, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=bartleby+el+escribiente+resumen+pdf In PDF document text
    • http://zoxeseje.irondalelax.com/uploads/1/3/0/9/130969656/duwitup-polunet-detuvola.pdfIn PDF document text
    • http://files.onepercentlegal.com/uploads/1/3/0/7/130775373/8603363.pdfIn PDF document text
    • http://files.leiydbeauties.com/uploads/1/3/2/6/132682142/0faffb39.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/1/0431/8425/9231/files/bow_of_eternal_frost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/wutije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3295/files/danixirazesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/wikexipudamovobofon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/firabutazivamibutisizugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/pevomuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/3371703179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxolalinurijelibabozafod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/47053201552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/24455023286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.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 3

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_off0000b9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DE 5364 bytes
SHA-256: d762b49d9dbb8013d2e74c9c5cf0808fa406ee922dd2658d7336561004121394
font_01_sfnt_off0000cbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFF 11260 bytes
SHA-256: a89fdc7ba354f80e4769cf222661332c0e5cb04eed48799f9d9c10f2bb0c9af5
font_02_sfnt_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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