Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7b336340b11600…

MALICIOUS

PDF

113.1 KB Created: 2020-11-01 23:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7761d72c4fd7539a632dee0adaa8923c SHA-1: 969992d614c9e0dd441f3ddbc159505c5d7ea93c SHA-256: 5f7b336340b11600499590867682f459d60d663514954541b0db3ad7c0cd8a75
202 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed for SEO-based phishing. The document body, though partially obfuscated, contains keywords related to military aircraft and a URL that aligns with the observed malicious redirector. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of a redirector and a link farm.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=f-22+fighter+bomber In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f94f8135449c.pdfIn PDF document text
    • https://xozavakude.weebly.com/uploads/1/3/4/5/134581018/wuxudezeledo-bejotejovibif-tizunal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f8d58f4b1867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5f94dfb2f32f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f97511b4b5b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f91e2a9025d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f8e3354617f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_5f9e8923355a2.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/344ccbdd-9c10-4dbe-b55a-288466acf118/2073703012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680921df-d3ae-4719-9fe2-0c15501fce71/vulafupezibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3759/6085/files/weider_2980x_exercise_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7aa78d1-b413-4e27-a82f-83510e3832f7/parujinuxupiwigax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17046 4700 bytes
SHA-256: 74580718e48f39893181a96f5fb760a5e7dfba64eaa03b89ff17a7956e7e8794
font_01_sfnt_off00018052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18052 12192 bytes
SHA-256: c34f7dc86eb743fbd81136d1b3637eb6d48fbd5459d8b93206ad134440c7b72f
font_02_sfnt_off0001a99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A99F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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