Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d8439334e49f5f…

MALICIOUS

PDF

35.8 KB Created: 2020-08-16 21:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 986d4b46ed6e4a3afdcac13d31f3aee9 SHA-1: 3836ad16216863e935703b0f442891e7fbb585fc SHA-256: 68d8439334e49f5fb59cb3f5b4171f21b0f1b9edba967483b1b31ab715d12ab9
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.ru/pify?keyword=ias+28+questions+and+answers In PDF document text
    • http://files.olivianicolethreads.com/uploads/1/3/0/7/130776745/sojusogu_xeribigufulov_xamilan.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/1/0437/5887/8881/files/alma_ata_declaration_1991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/66960110567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/biggest_companies_in_the_world_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/fizasijomotepuvosulijal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/head_first_design_patterns_c_pdf_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6740/4451/files/computer_applications_in_business_management_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/94963349798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/15680772678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/modular_encounters_spawner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/whatsapp_app_free_windows_7.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_off0000419c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x419C 5148 bytes
SHA-256: 73978f98a81e7285f2ee1cd0b51ea2a9327ac14b59a21d9441b79b984a25d236
font_01_sfnt_off0000532a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532A 9792 bytes
SHA-256: 015fc0b0b8b9fbb424c6d83968c6cd71efc17f32970f136b1c123a02f802043a
font_02_sfnt_off0000749f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f