Malicious PDF — malware analysis report

Static analysis result for SHA-256 560b4006b8f82843…

MALICIOUS

PDF

46.7 KB Created: 2020-08-12 01:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9356623b05c5306e73367bd26274bb90 SHA-1: 37e98de64b7e98e04773346e84aa07e727e1e68b SHA-256: 560b4006b8f82843dcdf81fa0b983211fe883a71ca113840aac2bdff957bd549
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.com/pify?keyword=best+jokes+in+english+pdf In PDF document text
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdfIn PDF document text
    • http://revimegeg.catalyst.gg/uploads/1/3/1/3/131381435/22e6a574.pdfIn PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdfIn PDF document text
    • http://nerika.cocktailsnponytails.com/uploads/1/3/2/7/132712207/xapumifop.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://cdn.shopify.com/s/files/1/0436/3429/4937/files/82825542001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/kabirux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/wirewigonodomilitagoxepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/alphabet_letters_flashcards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4006/3143/files/dissolution_bioavailability_and_bioequivalence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/sekaloxomoboralusevamiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/auditora_interna_integral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/cambridge_english_for_engineering_mark_ibbotson_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/list_of_industries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/sazonuvovolanunaluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7388/0739/files/81764872312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/62384604278.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_off00006bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 4972 bytes
SHA-256: 3e6ab49b9ba1efc7b03e8fd15b6b20274553d52e9c1fdbfda9051f0c62117306
font_01_sfnt_off00007cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEC 10172 bytes
SHA-256: 920614704451d49e24d3342ffd4e85d4bedc9a1b001403f5840158c2402a20e2
font_02_sfnt_off00009fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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