Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe3921e21c0c753…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 04:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 712d139a24c54dce21a033424dfc7f2c SHA-1: a104e696011e0cf7d0f55f39714695f5c3f01d93 SHA-256: cbe3921e21c0c753f43f6a487fe197cd776dfee13a7f6f0bf9d48952d1754aa8
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Asphyxia in newborns' and the tool used to generate the PDF, likely a lure to encourage clicks. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute 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.cc/pify?keyword=asphyxia+in+newborns+pdf In PDF document text
    • http://files.ratusaupdhpe.com/uploads/1/3/2/7/132710795/b10e92f2e8d4.pdfIn PDF document text
    • http://files.jordantaxserviceinc.com/uploads/1/3/0/8/130874533/lomupamez_didugiseruziza_roraru_gukoraze.pdfIn PDF document text
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.pdfIn PDF document text
    • http://files.sfka.org/uploads/1/3/0/8/130873820/52a4de4b53a3.pdfIn PDF document text
    • http://files.barrhaventravelclinic.com/uploads/1/3/2/8/132815220/6142835.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/1/0427/5663/6828/files/application_of_computer_in_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/95683518865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/26252356119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/golizeteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/anemia_drepanocitica_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/pmp_formulas_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/jurassic_park_theme_piano_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/kadujixisojaxofebopako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/tuwopowevudojemerad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/windows_8._1_single_language_product_key.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_off0000815d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815D 5488 bytes
SHA-256: 3d513aed3e24671bab6626d2937bb3bc74b591d23b382af9dc11e187cc7526af
font_01_sfnt_off00009418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9418 10404 bytes
SHA-256: f7416715dabff61deae93351d02e56ba99a83e550d663853536495627176bd5b

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