Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66385efc5c3f27e…

MALICIOUS

PDF

34.6 KB Created: 2020-08-17 12:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9bd20a4dce2b56fa36277fe9e8480c80 SHA-1: 3b8b3b87c44e0a4bac9ab84fdf539729b5b459a7 SHA-256: a66385efc5c3f27e5b44d37f0af151864df090ff56f8196835ddc54796a0cb69
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 firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic. The presence of a large number of external links suggests a link farm or redirection strategy 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.com/pify?keyword=balloon+no2+font In PDF document text
    • http://files.gardensofelegance.com/uploads/1/3/1/8/131856877/bogomiwekuzusef-guguganiminazo-ferolekow.pdfIn PDF document text
    • http://files.drcarterscourses.org/uploads/1/3/1/3/131384429/1077953.pdfIn PDF document text
    • http://files.sunsetairporttransportation.com/uploads/1/3/0/7/130775200/pawomivorakidavumuva.pdfIn PDF document text
    • http://files.oshawaprobus.com/uploads/1/3/2/6/132695919/4022979.pdfIn PDF document text
    • http://zozimuw.evrimozgen.com/uploads/1/3/1/4/131411688/fojedopilox_gapaniroxe_jamawujuvaposad_tawuworijob.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/1/0435/7118/3777/files/1212079396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/mastering_physics_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/zijejunalorigovaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/41334920132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/61664597678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/libijip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/emotional_quotient_inventory_youth_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/61787879478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/gerugepuripemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/56878689384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/6024950969.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
🗂 Part of campaign: drcarterscourses.org 3 samples

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_off000047a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A1 4668 bytes
SHA-256: 07f90f80ddc044b3919240f2478e7593065700e35c4eb1884daa73bf6baff41f
font_01_sfnt_off00005794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5794 11332 bytes
SHA-256: d724ab823f3a546cbc7574687126edc78bd74aa210c55cb896626c3a757fbb7c

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