Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e326b89aeea8e3…

MALICIOUS

PDF

46.2 KB Created: 2020-08-08 22:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 715e67cbe58d0ff4db780cd29d82759c SHA-1: 245bd9c146ecad47afa83c963bf00e95d7a4d045 SHA-256: 47e326b89aeea8e3012d493916d28ed00aa07481f949ebb36441a83fe1eec026
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.cc/pify?keyword=brief+answers+to+the+big+questions+pdf+espa%25C3%25B1ol In PDF document text
    • http://files.sandisharp.com/uploads/1/3/2/6/132681293/3f22a.pdfIn PDF document text
    • http://files.marcoperi.it/uploads/1/3/1/3/131383838/98c6dc597a8.pdfIn PDF document text
    • http://files.albcountry.co.uk/uploads/1/3/1/3/131397946/porijubemerupom.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/1/0430/4856/6933/files/93341015623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/joguxuxafudar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/certificate_of_achievement_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/jidoguraluwimunegok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/48920840983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/437620690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/xuzepizexopifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/22104319733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/97581703394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/positioning_strategy_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/65479835340.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_off00007377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 5920 bytes
SHA-256: 60aa195f63480ddb7af37969e330de7a8b6bb11d45956fe0bb085e764b892c58
font_01_sfnt_off0000875c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 10124 bytes
SHA-256: 7f1576ce435cf477fac13ca8cf4b43d53e75070725117474f612e0445142a451

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