Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d13ce64e49425a8…

MALICIOUS

PDF

41.2 KB Created: 2020-09-18 08:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7efbe9e72436323276c519b67845a71 SHA-1: d5d218971bbc791c4bf518decfe51f616639dc3a SHA-256: 8d13ce64e49425a816b8729929739db788012225f742e2b55582e18145e012de
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure, specifically `https://ttraff.me/wix?keyword=the+oxford+solid+state+basics+solutions+pdf`. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or SEO poisoning tactic to lure users. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.me/wix?keyword=the+oxford+solid+state+basics+solutions+pdf In PDF document text
    • http://files.cavalierkingcharlesspanieldogs.com/uploads/1/3/1/4/131453111/2a98ed.pdfIn PDF document text
    • http://jixanup.camwenrich.com/uploads/1/3/0/9/130969723/9f45f641710e10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://580141f1-2272-4449-8b3a-da0cbf19623f.filesusr.com/ugd/a2d007_49e7a8442d3849759796f36ac3bdef33.pdf?index=trueIn PDF document text
    • https://4aa21045-1445-4f8d-ad48-7a2c7bc38cab.filesusr.com/ugd/409ca8_0d22d3f25a5142c9bd8fff651bf6bf66.pdf?index=trueIn PDF document text
    • https://8807c3b0-a94e-4082-909e-46bfee6daac2.filesusr.com/ugd/97493d_4f844db62472446995d17a53fa838d90.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0424/8484/files/gnei_beklerken_10_blm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6796/5339/files/ms_word_cv_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/nph_davis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/alphabetical_order_worksheets_for_grade_3.pdfIn PDF document text
    • https://64bef9fa-4013-48f1-b415-54ac9f05a321.filesusr.com/ugd/314c35_646fd2b745d7427c9da33adad0cc8ade.pdf?index=trueIn PDF document text
    • https://ea020e05-4b1f-4feb-b6a1-956eb7d74521.filesusr.com/ugd/d01287_63a8e82a2ca943e1ab0f8ace9ad2d478.pdf?index=trueIn 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_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 5400 bytes
SHA-256: dfb6ce54207a1b5f56dab4ba0e8c00113a2889afb3c5e6c34b28e8d11aa8d95e
font_01_sfnt_off000073ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 10916 bytes
SHA-256: 98f0eda8b893efa1560890be438bb35ddad4318d49cdfb567b2efdb3a594e5f7

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