Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bf9130ad0933c2…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 04:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0bd0d85ae097e8c9b495fde120c5a5fe SHA-1: 22a64f3ca23a58be858963074a4b84d6c801583f SHA-256: e7bf9130ad0933c24db245ffce4390b3ab863845d4c1be0463e4e335c0c96801
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=manuale+uso+e+manutenzione+carrello+elevatore+toyota+elettrico+pdf In PDF document text
    • http://files.kimberlydevlin.com/uploads/1/3/0/7/130739616/838612.pdfIn PDF document text
    • http://files.insituvision.com/uploads/1/3/0/9/130969004/2973768.pdfIn PDF document text
    • http://files.acornspre-school.com/uploads/1/3/2/6/132696104/ca569.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/1/0432/6057/5908/files/learn_portuguese_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/92593446546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/loctite_270_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/relivupedipivojesizokepex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/bool_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/remusufepupevizemub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/integral_calculus_area_problems_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/naxidipizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/siniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/gufevomumuruvar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/8049380298.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_off00006245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 5520 bytes
SHA-256: dc2aaa47a97be8628bf09fab47aae0cca63f5a6a4dcd1bff4ffb9f1b7bc6d58a
font_01_sfnt_off00007519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7519 11004 bytes
SHA-256: 905e212e9ae49ebf9d87a4801ed7e8e9ef46a974f9ee146fb14376cdd8579817

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