Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b6cf57cec2fc7d…

MALICIOUS

PDF

50.6 KB Created: 2020-10-20 13:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: efc9be786f2c465e2ff062f416a7f86b SHA-1: 5db657bcf20562e29ae7312f88fa30364e09e88c SHA-256: 72b6cf57cec2fc7d8123434681946a8f2bd9322d4eab980c84942f9fa6d81cb9
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.cc/123?keyword=robin+life+cycle+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f8e588a0baac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f8a2d285029b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f87830980eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8a5ff650d2e.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/fofuwumok.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/ripotot.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/2d5a8df01cdd7.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/1/0268/8273/6309/files/wipeout_apk_hack_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3020/7400/files/4297429900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6597/5199/files/13573377125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/riruviju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/27385749108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f00f61-bd15-4606-b10d-729dadca7e3f/91196640472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd40c1a-02c1-4acf-a533-8a24b71bc989/92758942342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe8fe32-e730-4cf4-a1be-748932e6f213/80395092241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1248f5-9c59-4d31-afac-9ecb6ed52eea/21932354324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669be599-933a-48a5-ba31-83de2a0a8aa1/7308626533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ad5c16-7f6e-43ad-a938-ed4d6e3f5aed/bugigepivefom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8089aaad-4905-437d-90bb-271e8d9ee489/sifukaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5586a1d2-654f-448f-bb6a-8b39a6058581/13902327322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7557/2390/files/muzig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/exercicios_sobre_globalizao.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_off000088ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EE 5164 bytes
SHA-256: 3d07b58a03cea396687700f9b0867848de9e30023159f95c506e82c2d16361ec
font_01_sfnt_off00009a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A92 10204 bytes
SHA-256: 3a44e0854cf4d16b21901459377ce60a81b541927fc7ba1059476c14a0f36d85

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