Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28b9d3646b9eb6f…

MALICIOUS

PDF

40.4 KB Created: 2020-08-07 20:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1a8669da198703a0d8fcc003d2e3aa7 SHA-1: 3a733c598fc1bf4267f21dee76b02c3699fb39f9 SHA-256: b28b9d3646b9eb6f447a974ceec4845419c2b8b35b0f275814b8dcc0deaf6232
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=list+of+recent+mergers+and+acquisitions+in+zimbabwe+pdf', is designed to redirect users to malicious infrastructure. The document also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=list+of+recent+mergers+and+acquisitions+in+zimbabwe+pdf In PDF document text
    • http://files.college-sport.org/uploads/1/3/2/3/132302916/jukizamixixulo.pdfIn PDF document text
    • http://files.oakmountainfirewood.com/uploads/1/3/0/8/130874010/7878770.pdfIn PDF document text
    • http://files.gallerylucid.com/uploads/1/3/1/3/131398250/nepizegoxixi-wusuwuzetuk-xiwowiritakul-bidebet.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/1/0434/0151/1077/files/rrb_je_exam_previous_year_question_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/viwag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2444/7638/files/xaratazanugaxilezapolagul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/git_bash_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/fulodaneriwozod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/viwenirilazuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/turosexok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/28696682481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/panisigofinore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/nyc_subway_system_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/50724401592.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 4

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_off00005e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 5792 bytes
SHA-256: 3ee41b0a10f82a24a7b93ed6e397d83261c9258f03220e7e133c7bd466a38c86
font_01_sfnt_off000071cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 10204 bytes
SHA-256: d34cace38152689e2b657717d86a0b3c46db234c8a74d03abd8341009ca99602

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