Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c984df22708fbb1…

MALICIOUS

PDF

43.5 KB Created: 2020-10-25 08:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 72987b12aae8a340e94834a69361da20 SHA-1: 5ced374dd624a65b33928c5d3188433e26b3e2b1 SHA-256: 7c984df22708fbb1d7388912912628f7a3cf43316200023b5a772d3c67152eeb
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/aws?keyword=behavioral+science+lecture+notes+pdf In PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/007dab4a8ed4.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/monuxijinozopat-xowef.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/getobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_5f92019f846ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f9172dde47d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8dc8ad3f1c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8e51ab2877a.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/metubevozisul/nakimipilal.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/bunch_of_thoughts_book_in_hindi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7186/3961/files/alpha_titan_no2_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2688/1972/files/22910480524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/97640682802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b962da6-a473-4a00-b722-7e759a4ae82b/xamamewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1718330d-4aa6-4f40-803e-2956c3573d71/3489365987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3669/9555/files/43246371298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/homelite_2700_psi_pressure_washer_parts.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_off000069b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5352 bytes
SHA-256: 9164d720e7c65c49f91313fbccc5f18e1f291130898d0bd2e44ebe0aacbe87d3
font_01_sfnt_off00007bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF2 10952 bytes
SHA-256: 32a4ecfd26da7113f0e726336535e7c616ce13cb2b3d7e8d259501d62b0be56c

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