Malicious PDF — malware analysis report

Static analysis result for SHA-256 32175b57ce74b1a6…

MALICIOUS

PDF

46.5 KB Created: 2020-10-11 07:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a169087f52f34d96a34a4ef2b4704640 SHA-1: edef26a8d3b25d4ff8256e474cdfd5b0a6a265de SHA-256: 32175b57ce74b1a6f0b9e9d75e02ce84e168b9ca6f3c01ea33fbd58711aa8c63
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.club/pify?keyword=laszlo+polgar+chess+book In PDF document text
    • http://wexub.reveriecoffeeco.com/uploads/1/3/0/9/130969541/ranevotozukogavawel.pdfIn PDF document text
    • http://files.elizabethmarietabish.com/uploads/1/3/0/7/130775052/f66462b2f3a5cf.pdfIn PDF document text
    • http://zilar.valmcloughlin.com/uploads/1/3/0/7/130775189/7626936.pdfIn PDF document text
    • http://files.browneyedbabsknits.com/uploads/1/3/2/6/132696104/vojaset-pelunusezoxur-lafobegekobasot-kefepuluxosa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c2ad5729-7c58-4108-9ae8-1026d7048922/65465002701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c203a84f-8d96-4d01-b690-d1406e487326/38685533093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c3b557-534f-49f2-b023-73d46cc2cf08/67179091438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b91de4d-4719-4333-9fa5-19ccdd8ad290/jegasanuzag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/law_and_order_svu_missing_pieces_imdb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0927/1702/files/lemon_sponge_pie_pa_dutch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5993/files/75854780403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9620/2144/files/widut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6681/3337/files/texture_packs_for_minecraft_1.5.2_free_download.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_off00006a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A54 4944 bytes
SHA-256: ada5d41627a3239a367e0effa9fbb421cc3e99b5992dfc9ac1fc6afde562703e
font_01_sfnt_off00007b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3A 10600 bytes
SHA-256: c9f0b302a1a3a8f9f2be9de40959b539971380f83f84a130376923908f43e603
font_02_sfnt_off00009f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F69 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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