Malicious PDF — malware analysis report

Static analysis result for SHA-256 4657785253d4f02a…

MALICIOUS

PDF

38.6 KB Created: 2020-10-30 22:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c2a7c4bf3bf880510a9e8e938bc79382 SHA-1: 80de7d0864b43500954e20b90367cb595a3a4a79 SHA-256: 4657785253d4f02a706ade5d304dbea82ba66978fd70660334b7723f5b490143
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to court traffic, aligning with the SEO_UTM_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=12th+district+court+jackson+mi+traffic In PDF document text
    • https://nikibowo.weebly.com/uploads/1/3/4/3/134354591/xalufonepa.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/1/0479/8237/9164/files/20604013011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/myspace_1.0_layouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39877f0e-1004-44e7-8db6-375e2e14738e/loriligutatalaweram.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/telecharger_attestation_pole_emploi_cesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8508/2008/files/nuevo_diccionario_biblico_certeza_segunda_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5489/3722/files/diwawetiborop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f553ed18-905a-4c4f-9d3d-e8b3bf3d76c1/skyrim_se_top_follower_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9b87e4-fc6c-47bf-a649-bcd6429c0e90/welumugaxovukibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1461/6752/files/11290846745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560f078d-2162-432f-85d6-e01c5f59807e/bezugubelobodogizekubo.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_off00005779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5779 5456 bytes
SHA-256: 2949b479eeb1288de2d2e172ce6d7c60633a865f42ec2bbf6a3d97c7061d03c4
font_01_sfnt_off000069ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 10364 bytes
SHA-256: c7d00e2c9e5b0ab9c575043e9149be6d3b8084433ccc1fa3e17d5be0be70ece2

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