Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b9007ceab01505…

MALICIOUS

PDF

39.6 KB Created: 2020-08-06 22:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ba25cd673a8d2b9a1f8d9a4a37a53b5 SHA-1: 60dfc018a2d218dcbc6f363e05e4c72eb2315a7b SHA-256: 13b9007ceab01505b1a2129fd67e9cc07e9179840cd9fe62f20968f2a0b62c56
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The embedded document body text, though garbled, contains keywords related to a calendar and the malicious redirector URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's designed to host numerous links to external resources, likely for SEO manipulation or to distribute further malicious content.

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.ru/pify?keyword=calendario+2020+escolar+2020+sep+195+dias+pdf In PDF document text
    • http://files.fatherheart.me/uploads/1/3/1/4/131437632/5991763.pdfIn PDF document text
    • http://files.love2meditate.com/uploads/1/3/1/4/131452922/pilusitugil-dilekutufojidiv.pdfIn PDF document text
    • http://files.zumbawithmelody.com/uploads/1/3/1/6/131606546/6701429.pdfIn PDF document text
    • http://files.cofchristslc.org/uploads/1/3/2/6/132695636/kezowinajotu.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/1/0434/0609/8597/files/xutalimumol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/boxamosexopuletixugaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/diforake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/5756966924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/20082995954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4542/7102/files/2497669038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/39517085409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/bmat_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0722/9597/files/92951985009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/bogudijotaduwajujuwebuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/xibadusogoterigemubij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5020/4327/files/43462001496.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_off00005714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5714 5660 bytes
SHA-256: 70d64b3fbe668a0ac0c524fc146db2bc5a54105eec540e380493ebaf6f1044e0
font_01_sfnt_off00006a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A69 11404 bytes
SHA-256: 1bed37042312f38b7143b7e2f00dd47a6336fc744bc449c143d10cfe0cc107ad

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