Malicious PDF — malware analysis report

Static analysis result for SHA-256 285abbfd7bc5800f…

MALICIOUS

PDF

49.4 KB Created: 2020-11-03 20:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b57f8113c96e62bdc1d287c0bc43bc50 SHA-1: 199d2a7bb5185872fcf902aa8bcf1b2182c1a74b SHA-256: 285abbfd7bc5800f1699a9b432dfd58532d6c31f32abb80e6185670e7ee833e0
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.me/123?keyword=insignia+fire+tv+user+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f96f47507c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f87cf1981486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f8c82987a05a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f86f43edc9a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f9f084d894d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f9d9bfb7e93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5f9d633c336d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87af57c90e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/guxosa/capitulo_3_realidades_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9b57f1-2a06-4afe-98c5-698e75f5e96e/duxoferajopetagirodukofix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9187/6759/files/mevezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/26916419952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f29e45-31eb-4293-af7f-086172c3a99a/tikupafafuke.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_off0000832d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832D 5040 bytes
SHA-256: 7ee14b5cfbbdd70c36790653a4068ef3430aaec7962020b0a7a5b3638d43a8f6
font_01_sfnt_off0000946d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x946D 10716 bytes
SHA-256: 8743b2251d26a76c9a5340b6dd994c8977440602e70125608de46c09c079a3c1