Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e71ff9c8648bee…

MALICIOUS

PDF

38.3 KB Created: 2020-10-15 07:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 43d1ebe5c3de6981ea01bde8cc668264 SHA-1: 689d754361a94c62a43d67293a8f331207d62e88 SHA-256: 71e71ff9c8648bee1df576baea18b65aeea9b5be2bd72772d1bb6634c50123ed
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.link/pify?keyword=soda+3d+pdf+reader+full In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8706280e0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f87591794d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f876e2f0c43d.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/23197694-1c0c-4e77-b365-4040984bf908/19152710040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e474303a-8a95-4f0b-939e-fff2a8cf0e51/71834842008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cff5ae4-d6f4-4187-b2ab-a44f14398b19/18236484196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c51478d-30d8-4bdf-8a02-6262d8b9e766/gamolusisufevivubekeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee3ea1e-9688-4f8d-a80e-9db9ae241f4e/25192714691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b41147-cdc9-4352-a850-f29d8fba8b06/pudevusadeguke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8092384b-6831-4644-9712-f6ba137e30a8/44544187335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ccff0d-ece2-4fc2-9e96-85230f0805ad/6612353267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6838/1591/files/vutowizare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/free_amazon_gift_card_codes_generator_online_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55be4d84-dc0b-4716-8dad-312298410651/47135405858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e1c491-dcdb-461b-8529-dc3d35b225ac/pijapumirujexej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf8155f-ab59-4751-b90d-a6c194e79dde/24650128300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0e46f5-0fb6-4b9b-b1f1-9e81e924f89e/36869662854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e9ac68-9125-4a0a-98fd-2917f1e8cb58/40538815749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b130c37-2774-4ac5-a8d3-5188d02c406b/23844949010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a9cdec-348b-4d31-89fc-d5072f1bad9d/41214204295.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_off000058f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F6 5124 bytes
SHA-256: 7a7fb43c49a51808083ed5121f0d1c8265250f60aa38dfdd9a6edc13a450ab0e
font_01_sfnt_off00006a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 9936 bytes
SHA-256: 128661ba1abfccd749ed768cee3cf17e68673c70d9bea2222df406fe19b294c5