Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdebd5787ccdb6ab…

MALICIOUS

PDF

51.4 KB Created: 2020-09-10 00:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: dd67ae8b19b77feecb9e060d4e734e7d SHA-1: 1ea4461504eff921a51138dc5d765fc980cb33c2 SHA-256: bdebd5787ccdb6ab936392e1f69ac9606e81255615573ccd6ea1c3784ab51efa
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.club/wix?keyword=chronic+gastritis+pathology+report In PDF document text
    • http://files.drboduryan.com/uploads/1/3/0/7/130739593/4e79a90729bb746.pdfIn PDF document text
    • http://lebog.motivatetofit.com/uploads/1/3/0/7/130739430/vokubu-xarixoki-zapetizevewejid-xarulefeb.pdfIn PDF document text
    • http://solefotid.sarahbutcher.com/uploads/1/3/0/7/130776131/315027.pdfIn PDF document text
    • http://files.olympiaindivisible.com/uploads/1/3/1/4/131437753/befewusixogaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/6290de_3f0066e0da5c4a22b54f452213dcb9de.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3f859ae14ad842668a2045c447be4da2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0baf77_bc07481047a648978fbfaf92d404e7d2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/57466492367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4080/6824/files/95923114221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9729/1942/files/textos_budismo_zen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/zelda_minish_cap_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3697/files/lahaina_weather_wind_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/cydia_tweaks_ios_12._2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/9073/9099/files/tixuzasejagadizozu.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_off00008c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9F 5204 bytes
SHA-256: 30febb76dd19f7021af21003d577113533a44e03ba3d4e2e38327376cc837d3b
font_01_sfnt_off00009e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E53 10076 bytes
SHA-256: d55764d20dc2f953c730f7c792168be98ade001a92c3ef7e3da4343100cfecb5

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