Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7df98c32eeb8a65…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 09:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c0fa1ae3be6ea169d78f083c1de65a76 SHA-1: cfa821ba7ab393cf6191c8dd9649aaece00aefa4 SHA-256: a7df98c32eeb8a65f82a4e26fbf7dcd9c0d682ec519c345d43251429217116da
202 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as IELTS academic reading practice materials. The PDF also contains a mass of external links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The presence of a visual download button further supports the lure.

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.com/pify?keyword=ielts+academic+reading+practice+pdf In PDF document text
    • http://files.humanityreboxed.com/uploads/1/3/0/9/130969592/70efc217.pdfIn PDF document text
    • http://files.sjacksongms.org/uploads/1/3/1/8/131856433/ac55c623127.pdfIn PDF document text
    • http://files.pickypencil.com/uploads/1/3/1/0/131071063/guzoxuzadifovodati.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/1/0439/0577/7832/files/48009630555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/beremosulomisadujivuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/aswath_damodaran_books_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/28926707123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/65327090160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/student_attendance_system_by_barcode_scan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/ccpa_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/4687197108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/wiboferidazexotuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.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_off00007193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 5412 bytes
SHA-256: 50f0e0633e5b869c80f31e83e7e007f4550d2c348041fc50110179061ddf2bb0
font_01_sfnt_off000083e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 14888 bytes
SHA-256: 775bfc943aa1957776bb59bd6e0e7d540cc6164edf85e524d374f53843a51fca

Open this report in the interactive analyzer, or submit your own file for analysis.