Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1388bf78ce000d…

MALICIOUS

PDF

39.4 KB Created: 2020-08-13 00:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce5acc20590b28c0ce0fb182b11aa2cc SHA-1: b201333733041d56a203d068991b040caba0bc01 SHA-256: ee1388bf78ce000dcebe5e8d599d6801fcc665a8587aea10800e56125b0f4c8e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a Cigna prior authorization form, which redirects to a malicious SEO link farm. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful websites. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=cigna%20prior%20authorization%20form%20pdf In PDF document text
    • http://jilis.rebeccasheraton.com/uploads/1/3/1/0/131069934/gozojulugibawusasig.pdfIn PDF document text
    • http://files.12stonesmoldcleaning.com/uploads/1/3/0/8/130873983/xexesiriferut_nawuli.pdfIn PDF document text
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdfIn PDF document text
    • http://files.integrityautomotiveolympia.com/uploads/1/3/1/4/131408942/1651004.pdfIn PDF document text
    • http://files.rubberbymok.com/uploads/1/3/0/7/130775520/eb4a0dea7c.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/1/0433/4557/6088/files/gezovadozexilifenokobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/temagatajupulokosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/caesar_cipher_decoder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/gijofararodivirelimelifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/67928111734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/como_convertir_un_archivo_java_a_ejecutable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/hey_there_delilah_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/short_biography_of_william_shakespeare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/45373311564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/baminudodufuruni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4060/4313/files/alter_ego_plus_1_guide_pedagogique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/80724072913.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_off00005d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D70 5200 bytes
SHA-256: 59cd9572a1c6cd690f112dd31a7ca9b9976d6aed0a7271562b0537064c957392
font_01_sfnt_off00006f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 9820 bytes
SHA-256: 65ddc66b800812d84b4405bdd025835b02becc7a636a03aae161d091253ffeb8

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