Malicious PDF — malware analysis report

Static analysis result for SHA-256 9251af7cf1a597c1…

MALICIOUS

PDF

57.5 KB Created: 2020-07-25 04:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c7989c01a14fd5461f4ba2138ae4181 SHA-1: ed8047775877b38632ff7a31b6f4ef2473bfe247 SHA-256: 9251af7cf1a597c1de298c909d2a45b848131c9fb98192b6c5d4a4d884d3a735
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=anexos+en+un+informe+ejemplo', is flagged as a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it may be a lure document.

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=anexos+en+un+informe+ejemplo In PDF document text
    • http://files.maggiegyoga.com/uploads/1/3/2/6/132682820/xabosakisem.pdfIn PDF document text
    • http://files.marencoartrestoration.com/uploads/1/3/2/6/132680784/d74d8380c0c8a70.pdfIn PDF document text
    • http://files.instituteofmonochromeart.com/uploads/1/3/2/6/132695732/185da5ae77.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/1/0429/2483/4975/files/titisarofunapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/29855652215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/26409290788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/libivedovavakanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2351/3238/files/14334565257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/lomavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/60037342223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/zirukibiwoditej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/43189308716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34803766861.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 6

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_off0000a2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A8 4772 bytes
SHA-256: edceb839168e4fe3d3190e8f856a27c864ed6ef06ba912307f1cb03d8a2a8f61
font_01_sfnt_off0000b2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C1 11356 bytes
SHA-256: d6d774c5ba2b83be21dbc5544ebe25b89abe66bc4de13f47be00c50097667c78

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