Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9e773d8dbf16a7…

MALICIOUS

PDF

40.8 KB Created: 2020-08-28 06:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1b16f0504dcfafcf7a75237b97cf965f SHA-1: fb20c181fb6a3d4ea1d815ca2a2b19d2a18bb87e SHA-256: 4e9e773d8dbf16a7d46bcedc00c40af22b72e3a9edae5cd74e8f8b5b510b9f5c
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.link/pify?keyword=nielsen+breakthrough+innovation+report+2014 In PDF document text
    • http://files.lexarosean.com/uploads/1/3/2/7/132712080/vusilun-porego-xidikale.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/1/0462/6802/2941/files/hypertensive_crisis_guidelines_jnc_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/90371494551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/35182608158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/51809587997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/64405295736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0555/1271/files/aisha_song_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/apostila_java_e_orientao_a_objetos_caelum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3636/9318/files/guidelines_guillain_barre_syndrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9380/3415/files/science_report_reference_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/vitapabitot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/fisiopatologia_de_cancer_de_colon_y_recto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0266/5892/files/vuwopevodubilonojogumag.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_off00005e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5C 5728 bytes
SHA-256: cffc6826b91daee1bf5aaa568ba8dc04c747d7ecd4a7f3f47a40dd815b2e16df
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10944 bytes
SHA-256: 2f61e3ba94f1e4f306a5dbc1f14d6580b9547b91328c242a180f4c6530d12aa0

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