Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db1881b15bc87ba…

MALICIOUS

PDF

44.4 KB Created: 2020-10-04 06:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48bd6dd00a722cc64e690027b4745052 SHA-1: e6555dbc52fc7b69b5cbeca9b2c58077a5b0799a SHA-256: 3db1881b15bc87ba99aae042d39abb9165b7dff3bb3b9290bff995114bafdbfa
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/pify?keyword=chicco+viaro+stroller+assembly In PDF document text
    • http://files.tonihillkennedy.com/uploads/1/3/2/6/132695347/5532715.pdfIn PDF document text
    • http://files.artmark.com/uploads/1/3/1/3/131382113/fedifanepi.pdfIn PDF document text
    • http://gobulo.ywcahealthandfitness.org/uploads/1/3/2/6/132681481/d3d4075199.pdfIn PDF document text
    • http://zanizena.agprotocol.co.uk/uploads/1/3/0/7/130775448/puxebugamepi.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/16248409512.pdfIn PDF document text
    • https://site-1038948.mozfiles.com/files/1038948/61020488157.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/95075406832.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/fidobudijop.pdfIn PDF document text
    • https://site-1039883.mozfiles.com/files/1039883/memaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4975/1206/files/fun_unblocked_games_happy_wheels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6710/8247/files/kasetujuferatalozekezol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/skyrim_the_blessings_of_nature_choice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5871/6054/files/spore_galactic_adventures_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/inverse_functions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6648/6684/files/partial_fractions_worksheet_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2781/files/gakukosulovef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/mad_love_1995.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_off00006eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 5244 bytes
SHA-256: 66c01f8aa294841439eaec3e4b10f257e94bfb37ef52f869cbf3f76c7d4c451f
font_01_sfnt_off00008063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8063 10512 bytes
SHA-256: 79c48edc9a6bf7b24c7ad1df64a17e137c2ba111dce1382e14d29e633536a199

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