Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf10e5aa27c5d062…

MALICIOUS

PDF

46.1 KB Created: 2020-08-07 17:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b42b9d102ed83a191c6da897759e97b SHA-1: 3afe8bc5cd4c78a88bcf05f2fa54bc9e4f39b0b3 SHA-256: cf10e5aa27c5d062929ee51cc9e7d589495197c6f8ba049dcde2980fa4fd49cb
202 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Bacteriological water analysis pdf' and includes a visual download button. It embeds multiple external links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=bacteriological+water+analysis+pdf'. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bacteriological+water+analysis+pdf In PDF document text
    • http://files.fremontsailingclub.org/uploads/1/3/2/6/132682819/wawepufozivo-robuj.pdfIn PDF document text
    • http://files.pimaatisiwin-quilts.com/uploads/1/3/1/3/131379498/lurojezoke.pdfIn PDF document text
    • http://files.openarmspcnm.com/uploads/1/3/1/4/131407944/0df70.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/1/0436/3137/8590/files/nolujexalumaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/sosanuzowivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/nulej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/almeria_vs_real_madrid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/0497/9368/files/brlps_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/muloxegidorudonanegak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/sivaxevekidukesexudutal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/89106078308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zozaweguxilamefawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/punufidijojikara.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 3

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_off000074a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A3 5564 bytes
SHA-256: 2eb3467de14119f048dd732589dada590bf0706fc893d399cff7771c62212c3d
font_01_sfnt_off000087b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B8 10356 bytes
SHA-256: 3b752914058be9c6a266dfb5ab62c3638017dcdec4a257f94096c8ce2399a65a

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