Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96078c621053d5b…

MALICIOUS

PDF

39.9 KB Created: 2020-10-11 02:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f888a2d6a0a1ba0872418815fb08be69 SHA-1: f8b2c19a1483a0950643d27f04f8623d647d648c SHA-256: b96078c621053d5b4e5268efc901c685a8427c752236c60b12a534546f30d4a9
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=long+term+airbnb+chicago In PDF document text
    • http://zakexetal.earthcarecollective.org/uploads/1/3/1/4/131454143/jeroto.pdfIn PDF document text
    • http://gedix.toledopresbyterian.com/uploads/1/3/1/4/131409236/7573600.pdfIn PDF document text
    • http://zarudu.ascinsurescaffoldtoolbox.com/uploads/1/3/0/9/130969699/7835528.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/1/0483/7202/3445/files/kenneth_hagin_books_on_faith.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6001/4487/files/extruded_polystyrene_foam_association.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3044/5731/files/xuxetak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6074/7161/files/ruforisos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8294/3131/files/homelite_14_electric_chainsaw_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/black_diamond_guide_finger_gloves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0253/4551/files/vizio_e24-c1_24-inches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0344/7968/files/lenormand_woman_card_combinations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/6402/4229/files/webiweraxenunozibibuke.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_off00005e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 5084 bytes
SHA-256: f967f9eddbf19f243356fc0f43da99b0341ba1aabe72322b7799d6790fb8971d
font_01_sfnt_off00006f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 10364 bytes
SHA-256: 22bf00ff8b789b28546fe6a08db013259b222f6b32f4fbed3a6ef01c470d590a