Malicious PDF — malware analysis report

Static analysis result for SHA-256 11260a57db3a0a2b…

MALICIOUS

PDF

72.0 KB Created: 2020-11-03 09:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d9909a655d77d50bde0e4b58ccf1dc6c SHA-1: 8edc27d8bd4823419ab592e3eecf456cbae85539 SHA-256: 11260a57db3a0a2bc4742cbf4bfcf8724cc1c4e6a070e8eda81a9d2c2ae47dbd
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=second+class+petty+officer+association+bylaws In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5f991c98dc696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_5f9c66ef7e2c1.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/3ff0795aaa7cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f8c6b248b6d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5f99c6698bf3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/vikisepu.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/51180417886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3594/0793/files/knex_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1123/2701/files/assistir_piratas_do_caribe_5_dublado.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/wosapefezogen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1682/8581/files/chopin_etude_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/38572228117.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/nadazaburusurotapuv.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/nester_microbiology_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1871/files/zigenafalefimedame.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_off0000d34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34A 5584 bytes
SHA-256: b078b25ea7484054f458de7bdd37ee85c6214edb4de8985cda5ae1137906f124
font_01_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 12964 bytes
SHA-256: 243edafe9b9a7076e4362039e37171b1806aba4a56c0d3156d0e962b453d24a3