Malicious PDF — malware analysis report

Static analysis result for SHA-256 270fb67e811f9423…

MALICIOUS

PDF

45.6 KB Created: 2020-08-15 06:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4b52405891aa3dfc05b155fc53b029ff SHA-1: 6a221837d9d4b017166ade336a2b43a340c9ef2e SHA-256: 270fb67e811f9423517e942986b9ecb3d6f3c3fe3f208d4d0dcc43e4f10629a1
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=chirodini+tumi+je+amar+song++female In PDF document text
    • http://files.fionasophiaphotography.com/uploads/1/3/2/3/132303117/xejek_jutuzijesoda.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/1/0430/4296/3613/files/top_down_approach_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/rowejavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/wekot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/94093775970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/nerotiravazusikuramegewed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/94695333817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/nujotobonaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/genetic_algorithms_in_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/certificado_medico_de_defuncion_bolivia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/wisixapunebudeg.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_off00006510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 5300 bytes
SHA-256: f8c26e237e60cae16bf249d4d4bcbda99b336d4c59ffd3e8c87c968521a69b6c
font_01_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 10596 bytes
SHA-256: c91e5edd4f601b8b62307cedd2c8f5c85b05e2ab24ffda481cc39d1a27d9dd63
font_02_sfnt_off00009b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c