Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ff24065d70c176…

MALICIOUS

PDF

59.3 KB Created: 2020-10-11 07:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6f9f96062fbb383be7088a7fe4c57513 SHA-1: 4902dda9f429d2360f6d91d3db508665728955a6 SHA-256: a0ff24065d70c176b6cc939a878a7b9c0c07dba5ff70ecbaebda1c0095d53c04
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://gettraff.ru/strik?keyword=nfpt+certification+study+guide In PDF document text
    • http://bifukeveg.greenearthtravel.com/uploads/1/3/1/4/131454207/2193728.pdfIn PDF document text
    • http://files.tubuloids.com/uploads/1/3/1/4/131453060/tojejinuvivuj.pdfIn PDF document text
    • http://files.mcccil.org/uploads/1/3/0/7/130740069/46670.pdfIn PDF document text
    • http://files.wit-isms.com/uploads/1/3/0/8/130814288/venabumu-kitip-guboxaluxipur-sizusuv.pdfIn PDF document text
    • http://files.montgomery-jones.com/uploads/1/3/1/3/131398154/kinow-kalejagol-fokuxafupivuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/299b951f-c5bb-4511-a5cf-bbb9949e325d/63847044714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8158f7cd-2a7c-4f8a-8bb2-ebd88ca5b708/64269505849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505f2bb0-e5b5-4a0f-afcd-a2eb336da37e/18412216139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa75530e-5fcc-462e-928e-bb0079f8293d/96001001313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5240/9247/files/rubbermaid_cooler_hinges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/pejekapixoforodujeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7717/8022/files/83903417486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2752/8871/files/99660287529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8576/7850/files/lajazelesitakafosopijexar.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_off0000a993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA993 5360 bytes
SHA-256: 79a6f8cea384ce8314e932e5c4412b624ba4a4beb05a76434dc19e1a88672536
font_01_sfnt_off0000bbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE5 10784 bytes
SHA-256: d6658a4fd42ab807e6334649386ea8baa04aa0d8afaec58610f8d19ac47919f9

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