Malicious PDF — malware analysis report

Static analysis result for SHA-256 16879488a8789251…

MALICIOUS

PDF

44.2 KB Created: 2020-10-08 10:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: db0b87bf98fb1f23a78064976f4323bb SHA-1: 6ee4ba1851f89b5e9aa66a140b1266ca1b4c0283 SHA-256: 16879488a87892513cf85d7851e0417d63f29d3bf7fef42771f72f88197dc8ab
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://cctraff.ru/pify?keyword=lincoln+high+school+lincoln+ca+basketball In PDF document text
    • http://files.tamarabundy.com/uploads/1/3/1/8/131855981/wakexubuxinetojixib.pdfIn PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/0/7/130738620/34924bf2ad8b.pdfIn PDF document text
    • http://files.brdparker.com/uploads/1/3/2/8/132814241/2181634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68cd5b8-ede7-4ce5-9a7b-92cc649d50b2/86179171951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1531c14-d8ef-4041-b581-fa00b9890853/47954667942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d70170-c97a-4fa7-aa46-2261eaad4a8d/77387677264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab1a050-4a68-4e6c-a142-ab5156738f91/turije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af163b6-2386-49eb-88db-65dd7bf7512e/minujekanitike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/73670121367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/57991555956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6158/9669/files/wovajatepefizozewurawoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5067/6636/files/gtd_audio_g_622_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4934/1087/files/bosafibufezoxoser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7885/3284/files/cookie_clicker_achivements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2179/4969/files/40288900558.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 1

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_off00006c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C49 5112 bytes
SHA-256: 1e42e6665e44f786989f369566e393481c8bda2f7473f9f51c2fbcfed11d4ba0
font_01_sfnt_off00007db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB6 10692 bytes
SHA-256: aacacee6a4b44442849b8e7e47c7efb8bd8d0f278f31cad544d400ac94ceacbb

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