Malicious PDF — malware analysis report

Static analysis result for SHA-256 80542fa26ea01c76…

MALICIOUS

PDF

41.2 KB Created: 2020-11-05 12:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c1e2bc6471cc6a6c846436f9d38bfd68 SHA-1: b3a549e47589b8b6dbc25ee4d750cd9a57a40c2a SHA-256: 80542fa26ea01c7658a5efa4c5c51dae49235974e4ebcac5861d88619b17c0fc
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=bushnell+rangefinder+repair+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9ecd04735fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_5fa0880c80584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5fa0ef211bf14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f9785110843a.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/3562284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f927b2c8ebc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f9386ba1a715.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/7b146e86964d19.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/vokeri/japojugifafavileduxez.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/delta_shopmaster_drill_press_price.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/71034239703.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/puwupifixawufewuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/sansui_tv_sledvd244_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/xoxisino.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_off00005fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 5504 bytes
SHA-256: 756166c5a32f06cd25704bab8aec8530af1b02911c563f44fb0962a5e7977520
font_01_sfnt_off0000725f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 11032 bytes
SHA-256: 251acf5d012295a72f21083702f756a111143d27a2ab281c951f02e9916e863c