Malicious PDF — malware analysis report

Static analysis result for SHA-256 914875148d6c9d15…

MALICIOUS

PDF

36.8 KB Created: 2020-10-26 01:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6a254f10dc65f8e8e60724d66d0a4837 SHA-1: 923e6a0af4ca448ede88c57c14e909146e8ebb2e SHA-256: 914875148d6c9d159050cf91e580d5fcd9302a32bb8f55e5c544f01f155b9464
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://gettraff.ru/aws?keyword=meditation+books+pdf+in+hindi+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f8ffd92d65c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f8f24e69574d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f90b30c325ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f8d61bfa1852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f909fbf88b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5f9604be89ec5.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/1/0498/9013/2167/files/almost_a_hero_best_team_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2331/1263/files/risovezenavojiwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/66940535903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4687/0426/files/tatting_needle_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7342/9661/files/46778456753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/99892909462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6758/0831/files/crioterapia_en_estetica_corporal.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/gitozixofamazisekix.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/zilexotawumuguzabezebab.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/kewewanaso.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/essentials_of_human_anatomy_and_physiology_11th_edition_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/35986123692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/alien_shooter_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8347/0245/files/14596309411.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_off0000510c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510C 5428 bytes
SHA-256: 8855fabba50190244a0b0730dcd0752b68eb6e97e9540841095b969015ce0be1
font_01_sfnt_off00006394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6394 9956 bytes
SHA-256: 251779647383b5ccbba8fb09a71b35f80609a56646e8f76e2b2d5e39e250f635