Malicious PDF — malware analysis report

Static analysis result for SHA-256 6689c9b75141c413…

MALICIOUS

PDF

50.5 KB Created: 2020-10-09 06:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a586fae23b170cee0cb1a7ca3dca8462 SHA-1: 34846ca1ca059f6a215656efb082f5c105ea6f62 SHA-256: 6689c9b75141c41318b6ae28ed1cea7e1f8c7212f44a1efe15229f979e4b0044
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.club/pify?keyword=knowledge+is+beautiful+pdf In PDF document text
    • http://files.mansurdance.com/uploads/1/3/0/7/130775888/7896543.pdfIn PDF document text
    • http://files.sattvawoodworks.com/uploads/1/3/1/4/131406849/jitufovujapejolukuvi.pdfIn PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/buparupojuvuj.pdfIn PDF document text
    • https://site-1040687.mozfiles.com/files/1040687/nedanepuju.pdfIn PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/xakisureguzemorofi.pdfIn PDF document text
    • https://site-1041372.mozfiles.com/files/1041372/91175984402.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/bb8b3f74-7a94-451d-a368-dfdb8d1ad8df/zuzivanaxoditov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b072254-0898-4aeb-8fe5-f499cdb20b8e/rilipokaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ab6132-2276-4b22-883d-b853fb650fd1/136738597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d73e5995-544a-4b4d-a59c-eb52aae0604d/sasejasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c96959-0d4b-4d02-bcaa-455b1deec736/57855535608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7103f633-2059-4bad-8467-66d0d802aa5c/mukaroxibujuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2fbaa0-1a20-49c3-b58a-5c31f2ea8890/sonibabupaxinosozovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0491d9b-94e2-442b-a4d1-381b42d809a4/53557321619.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_off0000884c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884C 5312 bytes
SHA-256: cf7fd5f6d566a093280396221ddb4004c829ad5f0fb9b91630673a10cc83a0eb
font_01_sfnt_off00009a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8E 10228 bytes
SHA-256: 20d63a3e0551171508ff113bdd408f7054b6a14dd2c3d0fb7c6d1f953ce1f79f

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