Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bed1caa3ff4aa7e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 14:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df7ddbb9353a1bf736bb089de2785391 SHA-1: 38d9700365ee0aa0aeab7d43c8b71d6b60700f69 SHA-256: 3bed1caa3ff4aa7e1c1f47fdd9a8c0725bdfadfbc862664de7e47a19cc926e4c
234 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body text, though partially corrupted, suggests a lure related to converting PDF to Word documents for free. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=convertir+de+pdf+a+word+descargar+gratis+espa%25C3%25B1ol In PDF document text
    • http://files.aa-waterloo.org/uploads/1/3/2/3/132303189/burixupel.pdfIn PDF document text
    • http://files.writingfromthewastebasket.com/uploads/1/3/1/4/131408664/9786340.pdfIn PDF document text
    • http://files.steppingstonebully.org/uploads/1/3/0/7/130738765/golazekelasi.pdfIn PDF document text
    • http://files.majordj247.com/uploads/1/3/1/3/131381901/25a49d22f335.pdfIn PDF document text
    • http://files.happybuddha-aruba.com/uploads/1/3/1/4/131410952/9132913.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/1/0434/2523/5111/files/78155324720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7693/4042/files/25490732924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/nexaramidolototajufure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/gotovizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/7465669413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/rivejupavunujopoweku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1016/8744/files/15641214298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/gomewerofewelazesux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3549/0461/files/mufevabufuguvimexev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/kusalokipikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4048/0155/files/binomial_nomenclature_worksheet.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 8

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_off00005b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 5592 bytes
SHA-256: 85456e53d13dd8117bd1c40a99f0f220783a0488a41ff28deb7098b92d119248
font_01_sfnt_off00006e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 10852 bytes
SHA-256: 305e0558f14303de9bec1332c9c18e0cd42cf9785abc79929841832eaa43a882

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