Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7b9fdb75a8a3e6…

MALICIOUS

PDF

40.6 KB Created: 2020-10-27 07:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6b4a6a30d2902d2cbd4c64341e1d0d57 SHA-1: babf2372e5a9877a93a39833a6119873e5e1dbf1 SHA-256: 7e7b9fdb75a8a3e69450193ee82500bf4eb3239d4ef7d871537a0ef81fbeb7ef
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.club/123?keyword=honors+algebra+2+summer+packet+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5f9352348896e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f95aaa0449ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f9388f2c9efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5f9618bcee8ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f9797c06f0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_5f96cea7d837b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f90457d81ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f8f994a240de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f9305137846b.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/1/0496/3824/4518/files/keto_meal_prep_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9413/0085/files/31703282348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/the_family_guide_to_homeopathy_alain_horvilleur.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/weight_gain_eating_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/rugebur.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/gastrointestinal_tuberculosis.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bobakazifigid.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/30911043902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2273/2445/files/55855936850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1229/2260/files/navy_mid_term_counseling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0019/1935/files/50565557116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5862/5192/files/the_devils_advocate_book_iain_morley.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_off000050fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50FB 5576 bytes
SHA-256: acc0c2511dc7ab4d88896dd2ca936a5926d8e1ebcfcbc218ad9a9bb699ff85b5
font_01_sfnt_off000063f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 10208 bytes
SHA-256: af9322ec101fb623fbc1fb9e0bda5028a51da7e4b93bbc2e27f176662e7123f8
font_02_sfnt_off000086cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3