Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbea25d4e66a35cc…

MALICIOUS

PDF

55.0 KB Created: 2020-08-07 20:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 68612a85eae63016b882d1fe35d81fb2 SHA-1: 277a9a45ef4c9db164cefed6db7b65678f243c6a SHA-256: bbea25d4e66a35ccc7be57c9087029f1e50dbd19d09439202089b8e21dbdf680
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=best+self+help+books+pdf+download In PDF document text
    • http://golajuk.franceillustration.com/uploads/1/3/1/0/131070767/lejawerulugona_gavuz.pdfIn PDF document text
    • http://files.duncanjefferson.com/uploads/1/3/2/6/132696512/9844496.pdfIn PDF document text
    • http://files.saltandbarrel.co.uk/uploads/1/3/1/1/131163747/94ed9d.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/1/0430/9798/1089/files/2752279231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/binikuronofopasez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/90225073708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/47243066759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/31151583395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9730/8840/files/finowiligijomexizisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/37151066482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7028/2142/files/5430857286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/vejiga_neurogenica_manejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7335/5419/files/66758168237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3014/3395/files/soniturekodusebazubaxakiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/56354950366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2286/6837/files/the_astonishing_color_of_after.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_off00009127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9127 5380 bytes
SHA-256: 97fbf73923868c7ac67d2d180074c8e419861a86411f84ecc19ed227bed16d0a
font_01_sfnt_off0000a381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA381 13872 bytes
SHA-256: 12c8ba972133b0a30b4aaa9e4f784b87fda9470493b9afb60317d6f290738293

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