Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b82128bc5e984c…

MALICIOUS

PDF

39.3 KB Created: 2020-08-08 16:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1659e8e2b10d233f810b30bc005cd35c SHA-1: eb6202c610db50f330b8e5b9b9a9f17dcc556944 SHA-256: b0b82128bc5e984ca5301479300f56f0023e4de1108661a55b854946d8c17bff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one critical link pointing to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves a link farm designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. The document body itself contains the malicious URL, reinforcing the lure.

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.cc/pify?keyword=additional+mathematics+pure+and+applied+textbook+pdf In PDF document text
    • http://files.christianfitnesstv.com/uploads/1/3/1/4/131437676/4165780.pdfIn PDF document text
    • http://rexebere.cherryridgebaptist.com/uploads/1/3/2/8/132816066/96b9c890f2b.pdfIn PDF document text
    • http://gipewino.laurenclarkedesign.com/uploads/1/3/1/4/131406885/bakiwezopisaxeke.pdfIn PDF document text
    • http://files.mendonuptonmusic.org/uploads/1/3/2/6/132683334/707913.pdfIn PDF document text
    • http://files.upcycledonline.com/uploads/1/3/0/7/130739309/zudatijuvapesen_pexikalokiwo_fowuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/66125362080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/regovezole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/tezasurejitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/96175664636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/rubikuzowadorobog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/fozudevidono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/14039466596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/reduced_adverb_time_clauses_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/59895035655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/67032248616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/ethics_for_information_age_7th_edition.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 5656 bytes
SHA-256: 5ac34fe28fba0e690650857b59a76111da5bdb655e807bb3debb77bb5a09a7bd
font_01_sfnt_off00006e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 9844 bytes
SHA-256: 9bcb4a75158276674a18ad3d0455378101151aed7f2d4f03fabe08ab8e470b36

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