Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ed3dcf633defa5…

MALICIOUS

PDF

39.1 KB Created: 2020-08-09 00:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c224c25f90476856aa2b3144a88a6f28 SHA-1: 2c63e3df63f3c5542cde61c69c4c4abd7b86895c SHA-256: 90ed3dcf633defa5801f3285adeb887c1408d4415aef104833f90eaab593b8fd
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=blank+piece+of+paper+pdf In PDF document text
    • http://files.kenmeyerjr.com/uploads/1/3/1/0/131071062/lavesed.pdfIn PDF document text
    • http://files.wncvacationguide.com/uploads/1/3/1/4/131483249/konezapase_dosoxekomogume_jojogapow_gubixu.pdfIn PDF document text
    • http://lozigap.janewman.com/uploads/1/3/1/3/131379706/faxoke.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/1/0432/2089/3851/files/10592209827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/living_religions_mary_pat_fisher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/tefasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3282/7288/files/negative_brche_aufgaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/biology_concepts_and_connections_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/nokenutazirodufebulezul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/folaxexosudunaxen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/check_your_english_vocabulary_for_ielts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/gasep.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_off00005d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D52 5084 bytes
SHA-256: 36adbeb536a1f3521e796045af6114e9974460006e8dff66beefa80baaddbd3d
font_01_sfnt_off00006eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 9796 bytes
SHA-256: 2bc43e66fa1fd49c0265c11e56dd1fac5c8b9afb6c614582f0d4e0580aedf3e5