Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d17ecb522b93a7…

MALICIOUS

PDF

42.7 KB Created: 2020-11-09 16:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c40cc29d751a43944c4332b768b7403 SHA-1: 6b935fcc610c48205391384016fdd5b0390f4828 SHA-256: d1d17ecb522b93a719793c396a0d7244ad689601eafd1216f389d3d4d2638e2e
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a URL associated with malicious redirector infrastructure, specifically for a 'free download' lure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URL and the nature of the lure suggest an attempt to trick the user into downloading malware or unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/123?keyword=dream+league+soccer+2020+download+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5fa71a0f95457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumagabu/28028588799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fa988e-c956-4bd3-8080-fd88513cabde/gmail_print_all_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6fd19c-f9c9-4d52-9a2c-e28f08ee89cb/dead_man_s_folly_1986_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc7828b-ee2b-453c-9de6-d61c208d668a/32279911712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4747ea9d-5669-46dd-960e-22163e951caa/6540608390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb2b847-f10b-401e-856c-e283ee2a622b/4430583427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e5cc03-1552-4988-9971-9325c40ed25c/ievan_polkka_hatsune_miku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d32fc0-7921-43d5-aef1-156414caf441/navajo_loom_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82f149e-204f-49c6-920e-9e44b1754f0b/paul_harris_women_s_clothing_stores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77e715d-6d6d-4c5c-b051-de4e05448d67/26453408612.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_off000067f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 5708 bytes
SHA-256: ccfa626635b77ba713ef9ec22f6c93a292008e4910955245dbbb362d04bb42a1
font_01_sfnt_off00007b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 10064 bytes
SHA-256: a758258ac75a068a5c87d7ca2bdd38a3153046996c26071eee1c19280e4e3640

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