Malicious PDF — malware analysis report

Static analysis result for SHA-256 261beecb99a0cc35…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 03:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4583cc6cee44128dde0373f0fafd74ea SHA-1: c5c2eda68d1e5dcc43b60353eb98c197b1dfc653 SHA-256: 261beecb99a0cc35a2610b561cd65c5558893a80f5dae487d33d6c990a96a8ec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links to external resources, masquerading as educational content. One prominent link, 'https://ttraff.ru/pify?keyword=4th+grade+math+word+problems+worksheets+printable', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL, reinforcing the lure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents.

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=4th+grade+math+word+problems+worksheets+printable In PDF document text
    • http://gogomudo.johnashcroftandcompany.com/uploads/1/3/0/8/130814526/c6a823c457ae.pdfIn PDF document text
    • http://files.widpara.com/uploads/1/3/1/3/131380845/rivum.pdfIn PDF document text
    • http://lofewave.our-perspective.com/uploads/1/3/0/9/130969440/3477845.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/1/0434/5046/6454/files/pavapop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/91019599456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/valopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/klasifikasi_ceiba_pentandra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/nimesov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6399/2742/files/84835233735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/fowesiwidazaravawulobem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/gezugawukuret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/nafoxoxabiperenosetid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/sadabok.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 1

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_off00006448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5664 bytes
SHA-256: 326a4bc67e81a3bf08f73055d8083cc65a74adfd487e2ce05f78c999ab6fee96
font_01_sfnt_off0000777d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 11660 bytes
SHA-256: a7022cae884ef54fbf9eb75dccb7539496d5fccde7bb1942c4fb4100d046d645

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