Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd00a77cf73b5eb5…

MALICIOUS

PDF

48.2 KB Created: 2020-11-02 14:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a5bdad5ae68c2fac47fc233366fcfa66 SHA-1: 91deca3d3d1e83306548900bc2fcadf55292cf0a SHA-256: dd00a77cf73b5eb59d9fad43d69c8edee8153cf4e83cabba5ca233570c479a8f
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=aegis+x+zeus+kit+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f8fbbde82ab7.pdfIn PDF document text
    • https://kuzewejutoba.weebly.com/uploads/1/3/4/3/134398832/rupimipejafupuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/firigugixujotov/16723476392.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tiwukegixoxebofitij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065192b7-3029-4aa8-86d9-82341a00ddee/minecraft_1.6.4_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3613d2f4-41df-46ce-8cb4-b60fc18556f9/kujuviboxubopikitiza.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/slightly_married_mary_balogh_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/4th_industrial_revolution_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8039/9003/files/51822834150.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/92805860868.pdfIn PDF document text
    • https://s3.amazonaws.com/xedobox/lovipide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7504/9883/files/86684033560.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/athens_state_university_online.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/cantonment_board_act_1924_pakistan.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 3232 bytes
SHA-256: 30e269220f0781f5057555d1788f41c9aa1729a3692eae5fa897cad358d252fa
font_01_sfnt_off00006e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9E 4852 bytes
SHA-256: a319fc800c5be3e9c700c4774b1ff3783b0ce5400f3534d635916850a84b6437
font_02_sfnt_off00007f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 11868 bytes
SHA-256: 54a4c39c2e327dd02a1d18963f895c1fcf2cbfce2d755951b6a57bdd8f681b19
font_03_sfnt_off0000a5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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