Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cff13ea4933dc0…

MALICIOUS

PDF

53.5 KB Created: 2020-08-12 02:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 581dc571b15a49af600014da2e3f5e7c SHA-1: 7d166dd2bb6f7cd1dd8e7308f62d79ed96962169 SHA-256: 24cff13ea4933dc09c1c24b8d30400fdba6228e73fae5d85104a9b6d486d7c2a
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing 'Simon quest instruction manual' and the malicious URL, suggesting a lure. The presence of a link farm heuristic further indicates a malicious intent to redirect users.

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/wb?keyword=simon%20quest%20instruction%20manual In PDF document text
    • http://files.nashvillephotographyclub.com/uploads/1/3/0/9/130969169/sunuvisubido.pdfIn PDF document text
    • http://files.northshorereaching.ca/uploads/1/3/0/7/130738805/bimogesamideni.pdfIn PDF document text
    • http://files.mca.school/uploads/1/3/1/3/131384468/dafef8f594999ee.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/1/0429/8145/8069/files/xilakesinata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9508/7522/files/nomelenozinalepuvupurot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/6657317668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/52536524099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/2005_ford_taurus_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/gisalitupodamapofelexile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/42338762192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/mibupimeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/36069256748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5245/8396/files/anti_skid_braking_system_in_aircraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/wazijevirikesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/wifelulekanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/46421923418.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F04 5348 bytes
SHA-256: ea445802b6d96f6db688c1b91f7c5f04aa97ebed141d0a2b3cc8c18b4f670ce1
font_01_sfnt_off0000917b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 5172 bytes
SHA-256: aaebe2ee2ffbc099147b647a740a62a57c28d12edf69baa80559f82851e44d7d
font_02_sfnt_off0000a2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F2 11604 bytes
SHA-256: 03c6a38af380d1987f0cbb85e4f5f34c95a3d5b8cea959ee8f6d3db25f9903b3

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