Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cff737c074220c7…

MALICIOUS

PDF

43.7 KB Created: 2020-10-30 22:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 93691d1cd29ad2d714063c4c47f0519d SHA-1: ccd449d924729d505c4f301445d20bc0491e0c24 SHA-256: 3cff737c074220c7f6cce0d65de8e04dd6888240ac7b8d4d9898441250b7349b
194 Risk Score

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.me/123?keyword=old+weaver+high+school+hartford+ct In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/janigusebidasodogodukodox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc95905f-abed-44ce-a0b7-645e848d7156/55770053228.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/96293854935.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/icarus_and_the_sun_tattoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c00245b-5af9-410f-95d1-fed7247457d0/rujiminobunukofut.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/patient_self-determination_act_psda_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b977800-7c5f-4019-9fde-726bc59418fe/futhark_a_handbook_of_rune_magic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377e6cda-ebaa-46b8-b52c-24491aa1eb12/dictionary_of_landscape_architecture_and_construction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/2192/3001/files/6106021120.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/b._sc_mathematics_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f44500-0a26-443f-969c-04dde1c0a542/dutapiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/welafefutejojufagun.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/74882913128.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/61214443892.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/fefuwapatulupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ffc08-34b5-4242-8051-1b11c9a9e05c/61854384863.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_off00006afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFD 5460 bytes
SHA-256: 6c58e9e5eb0d23c396f2adcba4931dcbef4bc2ce1b4b27936beb0d31dfa6a36f
font_01_sfnt_off00007da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA9 10704 bytes
SHA-256: 40a092abc73c001e6f97858c27e214cd87ea56755d1f2553fdfc31a9e87403f6

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