Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bf26d8411c227b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-06 13:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c851bc268c2ec744292969d92219453 SHA-1: 88df2d39c89e5ac0a90c82e80db6f77c972fb0ad SHA-256: 26bf26d8411c227b15864e19054e391d2389d78071438c7393dd6436cd1d291d
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=curso+aprendizajes+clave+preescolar+pdf`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including `https://cdn.shopify.com/s/files/1/0431/4588/7905/files/gitebazupemugij.pdf`. The document body, though partially corrupted, contains text related to 'Curso aprendizajes clave preescolar pdf' and the redirector URL, suggesting a lure to download a PDF. No scripts were extracted from this sample.

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=curso+aprendizajes+clave+preescolar+pdf In PDF document text
    • http://files.hackmatacktrailracing.com/uploads/1/3/1/4/131483154/cf1ab.pdfIn PDF document text
    • http://tagumaj.beyondbeautydevon.com/uploads/1/3/1/3/131379362/nurivevirela_zadaxovabefi_musamarud_towunemu.pdfIn PDF document text
    • http://files.capillariesjournal.com/uploads/1/3/0/8/130813992/ce1ad6c.pdfIn PDF document text
    • http://letujeli.4rtomorrow.org/uploads/1/3/2/7/132741029/aaef1d1759fc.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/1/0431/4588/7905/files/gitebazupemugij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/76257444809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4672/3996/files/54690526014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/animal_farm_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/64291652317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/numirudewunaguko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/74225619568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/bowopijogos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/regepovuwonixut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/48875415258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/37414996685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/nuwaworugugebukufox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/87103866147.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000774e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x774E 11816 bytes
SHA-256: ab813c682fc57a31ad17584568fcde417950039f5d8997d777280c60f0dbadc2
font_00_sfnt_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 5240 bytes
SHA-256: d147563091b11ad47bc8c28c386e626a7b53591254c9f0dde3299efa05e8f838

Open this report in the interactive analyzer, or submit your own file for analysis.