Malicious PDF — malware analysis report

Static analysis result for SHA-256 1339b6b0c58b536f…

MALICIOUS

PDF

38.2 KB Created: 2020-10-31 11:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 8e7516f484061c83cff10ffab315b542 SHA-1: 302b205d2be0d9fa3bbbfbe37b12b257c19777c1 SHA-256: 1339b6b0c58b536f9d71463ecd6303363f26f9367819186c00a032405021bdc9
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=in+circle+d In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5f8b0d1f127be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f996be67a6c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f8ca427b7703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f9c5f265429d.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/1/0441/2764/9944/files/bujejevenagaluxidusiwule.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/kunoxejimorevuxeri.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/89302191217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2685/files/kozoruzedesu.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/24933580232.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/chase_exchange_currency_rate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3222/6203/files/rokuvidapizademon.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/the_sims_mobile_latest_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3441/8586/files/nilafikiwak.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/34769401954.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mabemeninonokajig.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_off00005a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A48 4484 bytes
SHA-256: 965ec6427a7194696d262ccf587ae3b943784688aa87ebca035e3f6adefa574b
font_01_sfnt_off0000698f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698F 10228 bytes
SHA-256: 1ed8ca66aaf41e94f33ce63d278d87f20631c173a9b725d8a7efd168058b0665