Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b436fdfbd17dc8f…

MALICIOUS

PDF

52.3 KB Created: 2020-10-31 02:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e4216be0b7d0817c93f4b09cfca52d5d SHA-1: 34b268a890abb8d6efbd4beec79c40b38beff77c SHA-256: 9b436fdfbd17dc8f154e2cfc91d2ce77710dfbb10f95c20b32b7ab90f8423f71
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.cc/pify?keyword=watch+weathering+with+you+english+sub In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_5f98861017951.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/2977163a-ec84-4b72-96ee-7378e575b8ef/fulawibuwukogife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cce2500-40f3-49d4-91cd-30a14c1e13e9/wejuzurotimoniseg.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/5726966801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6be1a76-9084-4169-94ae-b01f2735fdd7/77413532007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7130/2553/files/juxozinowitaxonajemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623dc26c-27cc-42c5-bf80-91c89fe5a86c/lavavidikujubedibemuxaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2d8601-2585-4892-8236-682c23702d7e/20209342512.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/agate_rock_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a118d3-98fa-402f-a65e-5a6514ff64a0/xabimuwijivopidivurakov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18991374-1f26-474a-ad94-0f60c0e20f02/73931443880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60764f5a-72cf-444d-8f9e-061c4531b089/tapavuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f1d913-f4b2-496f-89a0-b2c7eb48bcdb/32427803977.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/zefosi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 3596 bytes
SHA-256: cff8cfb503795e9ce180e5eea9a2af52667e02d8dfe66181e2d05513403bd68e
font_01_sfnt_off0000789f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789F 5408 bytes
SHA-256: c54632314afc0f5198a2fd30f3676a41dfb91bd2bd9e138f5c70d904070a46d5
font_02_sfnt_off00008b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 10460 bytes
SHA-256: d60322ec10489cc13db4b869caadffd05500d079122bc64b53a5dccef73c980c
font_03_sfnt_off0000af0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0C 16064 bytes
SHA-256: 0ac1fb90629bbc6fabd35a0dfbe4a377f55ae7564945aa8ae415f83886c567fb

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