Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f31592f109cd089…

MALICIOUS

PDF

43.7 KB Created: 2020-10-02 04:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-03
MD5: 13fd5520a9c9c81ac22fd54edd51daed SHA-1: 07f421c00f8b71fcd4772dbfddcbf2797de13950 SHA-256: 5f31592f109cd089b2204fe8bc953f60879d7acd886cc4ac5b1833885f997267
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://cctraff.ru/strik?keyword=definitive+guide+to+retirement+income In PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/kuwisemibawilerowan.pdfIn PDF document text
    • https://site-1039278.mozfiles.com/files/1039278/70389153698.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/21194378877.pdfIn PDF document text
    • https://site-1039332.mozfiles.com/files/1039332/gawifiluwiwagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005fa8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005fa8.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000093c3.bin)
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/19280686674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1634/2682/files/carl_schmitt_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/lipegan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5148/5850/files/navadmin_214_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2364/8928/files/dragon_ball_z_kai_episode_1_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0581/9555/files/48886662211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3304/8741/files/98153230981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8881/2959/files/datinepomigazenirapom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0860/5590/files/hello_kitty_pajamas.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 extracted file (font_00_sfnt_off00005fa8.bin)

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA8 4864 bytes
SHA-256: 0ab340b31df11335353098e74abda50d74d0a4fcf52bb6d97b42468e3612980c
font_01_sfnt_off0000702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 10424 bytes
SHA-256: 416a6c5ed6ff4e4387b30222d5ba5372b5f00c21a0fed89728b86b7207791cdf
font_02_sfnt_off000093c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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