Malicious PDF — malware analysis report

Static analysis result for SHA-256 11cdbbc3cb588d66…

MALICIOUS

PDF

43.9 KB Created: 2020-08-22 04:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04f1a517e063843527d9db1a94bd77f8 SHA-1: f402dca1be5f3d2c49059be5051265f2b7dcc019 SHA-256: 11cdbbc3cb588d668b2b9b383ea0c1caeb3519eeab160ca935a066fa7def76e9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service, which is flagged as malicious. The document body also contains the same malicious URL, suggesting an attempt to lure the user into clicking it. The presence of numerous external links, including to a redirector, indicates a link farm or phishing attempt.

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=writing+a+comprehensive+report+in+special+education In PDF document text
    • http://bubiz.magentawilde.com/uploads/1/3/1/4/131406390/605733325eb2afe.pdfIn PDF document text
    • http://files.terrifictuakau.org/uploads/1/3/1/4/131409309/damapuko.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/1/0437/4423/1575/files/79056662733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/storytelling_marketing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/precalculus_with_limits_4e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/dupizujitijotelafajow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/anatomy_of_bodybuilding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/52156442544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/jafopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/27446675986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/sazavuwixeletoful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/pdf_to_word_converter_download_mac_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/standard_form_into_vertex_form_converter.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
font_00_sfnt_off00006cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCE 5560 bytes
SHA-256: edb480bd5ab2d878d905c385196c1d6f6cbeeebe60c8458ee1acc483a6e15076
font_01_sfnt_off00007f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F90 10144 bytes
SHA-256: 996451a11f4ff917e500782ff35de3973df6f2657f207a1322c3bbcd631b459a

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