Malicious PDF — malware analysis report

Static analysis result for SHA-256 f680777d1135ef1f…

MALICIOUS

PDF

56.8 KB Created: 2020-11-03 04:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02b2f491709697d2192bd9f11be10743 SHA-1: 90d9adbe3096fe8340b481e8c06eb85a7b83af30 SHA-256: f680777d1135ef1f59935fe53b4ddb5b9dc9b9b5a930f08768c725a122ac7487
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?keyword=ventura+county+fictitious+business+name'. The document body, though heavily obfuscated, appears to be a lure related to business name registration, aiming to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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/123?keyword=ventura+county+fictitious+business+name In PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/widesisiba.pdfIn PDF document text
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/982995b7d985770.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/8c440.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/72004b55-341f-4533-8c9e-432655738972/12721207225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc86af0-966f-4c3f-aca9-bd9609f43425/66931743565.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/bufepumurazaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/22488147565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b824f448-e280-47b4-a663-d60fe9aba4f6/tazuxixesuguzozuzod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47442bbc-f453-4ea7-91bf-a1a18b7b6864/dogurarukewotolo.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/zafejefamokelodiseroxebod.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_off00009e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1D 5204 bytes
SHA-256: 6829d04715e04528dcc1bcda7e229ab0acf9a8170815ea474fd01ddb8077891e
font_01_sfnt_off0000afc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC9 11384 bytes
SHA-256: 216578ae28e3937f92db803938e7cc530f208e8640473d8840c1372714e6caf4