Malicious PDF — malware analysis report

Static analysis result for SHA-256 95241fa84e2bd363…

MALICIOUS

PDF

48.5 KB Created: 2020-11-01 09:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7f65c0d1a501d29830691827d07f1cf5 SHA-1: 96f166f389d8202b52360b27a058cd92b69144c3 SHA-256: 95241fa84e2bd36348ab566583330d93715c1df6157b80dc8ae58f269c2d421d
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=what+did+the+triumphal+arch+represent+to+the+romans In PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/7553553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f92940d97b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f8b653c2c2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5f9bd1a5cebdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f991dc5be8a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f974c480d61d.pdfIn PDF document text
    • https://nobigifawu.weebly.com/uploads/1/3/4/3/134310244/3eec522667040a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007dfd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007dfd.bin)
    • https://uploads.strikinglycdn.com/files/0a62ffd6-a6ad-4854-a6f6-3f6576202f67/16791369025.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/process_costing_system_pros_and_cons.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/unit_step_function_matlab_simulink.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2327/3631/files/36784737124.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/if_you_like_pina_coladas_movie.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 extracted file (font_00_sfnt_off00007dfd.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 5324 bytes
SHA-256: 4d0fba4efa2b6951563ea6a4ff8c703171c7d623e84870e9fb330a9c949532e2
font_01_sfnt_off00008ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF7 11048 bytes
SHA-256: 72394cb64ce426fdf2049204eeb1b5705d16b5082af1304c4977aac7cad11372