Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada3e447c2569b58…

MALICIOUS

PDF

70.2 KB Created: 2020-10-03 18:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0287dc3fae82976f0b8c7d45429ce15d SHA-1: 1abd280fae9c7c3a939b85d0382048280322fcd4 SHA-256: ada3e447c2569b584f1be4d4d638c0e154962dcbcf08eb40ae3ea8e16844ae5f
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://gettraff.ru/strik?keyword=anne+with+an+e+book+pdf In PDF document text
    • http://files.ninamariegardner.com/uploads/1/3/1/3/131384145/jififazavududariwani.pdfIn PDF document text
    • http://files.ageniart.com.au/uploads/1/3/1/3/131380845/napudorit.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/fibev.pdfIn PDF document text
    • https://site-1038837.mozfiles.com/files/1038837/16344684610.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/62117564-7210-42f1-8556-fdfdf06f4b54/tubar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b441c9a1-4978-401f-a1e4-5bc2a5a76327/nifuzorexiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666cb78e-fa9a-4eef-8306-f1c720f8cb04/86625577817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86888890-d4b3-474d-bc76-34df51061e56/78370820716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129dd269-598f-4915-bf47-a31bd0ea2653/dexetodekowetog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6480/6555/files/bromine_electron_configuration_long_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/46873165514.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E8 8744 bytes
SHA-256: 69f717b400bc2cb3257173a4bacf68fd06052e3af414266ae2f16476155e382f
font_01_sfnt_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 5108 bytes
SHA-256: 26fb42794f4eaf12e6328d59afec9dd5b698cb9a480be9513efe931fda704686
font_02_sfnt_off0000e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 10472 bytes
SHA-256: 0895a2749a707f418beb10d8833bed8f420201a163c427ee9d7c034a8b936304

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