Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dfa6ae5b3d175c…

MALICIOUS

PDF

45.6 KB Created: 2020-10-27 03:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8c69059e6b77f71c556610ac0348a034 SHA-1: c3518e875284e84a207ae9d6d8c18029ed60fda7 SHA-256: c9dfa6ae5b3d175ce6e0d60dfc1eb10f1a29d9f67b0765bc2d7bae9209ef3337
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.me/123?keyword=cousin%2527s+son+is+called In PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/8684813.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/zonaxitowenin.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/b69de817c1.pdfIn PDF document text
    • https://manoxumumaxu.weebly.com/uploads/1/3/4/4/134472756/kevojajanibat.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/fewosozoro-geguket.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000073de.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000073de.bin)
    • https://s3.amazonaws.com/buponuwebi/anti_dumping_wto.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/bnf_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bank_of_baroda_education_loan_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/risibadujexokusoloxatek.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/80322365358.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/chelating_agents_and_metal_chelates.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/84278712933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e324cf70-e765-4300-b932-97835f83123c/81269316393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5731b9b7-dc7b-4874-8d77-4fe77ae5d6ee/91245237553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec385fc-f509-4ead-b7f1-f400df77699c/77122143221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2065/0149/files/showtime_anytime_activation_code_not_found.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5941/8553/files/pidoteguvepalubosivozij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3160/8487/files/usa_pan_bakeware_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5318/5685/files/mahiki_drinks_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0381/1739/files/lokurafisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1527/4147/files/66834283346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5389/3782/files/xamenetagibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/largest_roman_triumphal_arches.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 extracted file (font_00_sfnt_off000073de.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 4776 bytes
SHA-256: f2019e42d45f22268f3e40bcfc9191944f1d1b6d125fd21e2ff53fddaa9190cb
font_01_sfnt_off00008428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 10840 bytes
SHA-256: 0f7d8af1d550077e5f308a7bc7aa10ec16b6932306bee30f3d98910a92a351f8