Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b11724af7418da9…

MALICIOUS

PDF

39.9 KB Created: 2020-11-02 23:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a9a79d5615d6a9089c8cd0d6896c3c6a SHA-1: e37adbaffa5e7d61a512b008068cd10770b5ceed SHA-256: 9b11724af7418da95195b63c76e6c1e723a57589360d8698c3b7ccb0679e4cdc
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=garmin+4210+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8739162bba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f882b2e66f7b.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/xukonakefules/roomba_890_vs_690_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8571/8198/files/texas_professional_association.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/dajiwavemadawoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8734/5826/files/belly_of_the_whale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0585/8729/files/algebra_2_simplifying_cube_roots_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3305/7187/files/fijag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2936/4387/files/dokid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7557/files/yale_b1l_z-wave_key_free_push_button_deadbolt_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5944/5405/files/8294401356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7928/5915/files/rikorenenafimigulenowud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/inventions_that_changed_the_world_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5873/1429/files/48125181762.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_off00005bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAC 5100 bytes
SHA-256: 164df3b751818ad17dec4f1df8a2db50fba60dd1713e92db19b9237c27ab7fc3
font_01_sfnt_off00006cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 11212 bytes
SHA-256: 2a5b523182d1c6105fb483c42c7c23938687b6db3e16e3297995c2f7e03e5c32

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