Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6562f4297e9b3e0…

MALICIOUS

PDF

45.0 KB Created: 2020-10-28 05:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 30d4aea0cec6aa10ff91d2b7eae8cf07 SHA-1: 6d63b7ade94de76ced66683ec3b8b2a967b92ff8 SHA-256: c6562f4297e9b3e07768939567d5b8dd0316c782deceefa3044514048bb0b2fd
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/123?keyword=the+fresh+air+fund+new+york, which is also flagged as a malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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.ru/123?keyword=the+fresh+air+fund+new+york In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f8dab6a7cdc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f87f5ae88486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8b1e9fb1019.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/vomivemavutu_sowomafiw_gujurox_junasokawisore.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/6a016.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://fipuvulozubonoj.weebly.com/uploads/1/3/4/3/134313175/nojosigutujawemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_5f97ffe041a42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f872d219b4ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8a63aacba5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libeganot/aaronic_blessing_in_hebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/tiworosexolikuxixe.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/14279596080.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/monthly_current_affairs_in_english_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/advancing_queensland_priorities.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/botany_notes_for_ias.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/smd_capacitor_code_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4323c9bd-c1c6-4383-bd03-426ebd296ddf/57362579139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe664785-19af-4399-8fcc-62e70c69b565/rilixekoxewugu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9C 5168 bytes
SHA-256: 23921ee267c5d88d7a67a1b4eed7816d37755c0c29093ebb00cf080cde7a2e6c
font_01_sfnt_off00008148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 11072 bytes
SHA-256: b5a21ff0a19f07584c8f030525cab93341b0c5f465563722ba9ce4f2df21d386

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