Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b76c452a35f8b6…

MALICIOUS

PDF

39.1 KB Created: 2020-08-13 10:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a857ec78b3bbd78d3e03d45ea64b563 SHA-1: 19e7b547e8760c57c96ab328df1d5875b376e0d9 SHA-256: 84b76c452a35f8b6ceb1bbfa7fa1b2b5bcbf53cc35d7f57001b1ac93a4fabfca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector URL associated with malicious activity. The document body text and embedded links suggest a lure for free downloads, likely a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a high likelihood of malicious intent.

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/wb?keyword=cross%20stitch%20design%20books%20pdf In PDF document text
    • http://famofojas.photoartannakoudella.com/uploads/1/3/1/0/131070493/kaderop.pdfIn PDF document text
    • http://files.fitzgeraldenvironmental.com/uploads/1/3/0/7/130740490/2034032.pdfIn PDF document text
    • http://files.risingachievers.org/uploads/1/3/0/8/130813524/gofaruz.pdfIn PDF document text
    • http://files.jasonschwabart.com/uploads/1/3/1/4/131438055/povumozaxegawefaxixi.pdfIn PDF document text
    • http://files.homeschoolingwhileblack.com/uploads/1/3/1/0/131070618/ruterabo.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/1/0428/9911/2099/files/model_based_clustering_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/44633908309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/indore_master_plan_map_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/in_n_out_spread_nutrition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/18222213963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/the_tao_of_wing_chun_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/rokeboxasovaguxemixete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/54597858942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6866/8569/files/3815396719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/43762392791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/96023726063.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 7

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_off00005ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE1 5284 bytes
SHA-256: c15938c6405f3a44bfcc87355cdc612aec8695c6192ecfa2dc9fb61ce44fb5c1
font_01_sfnt_off00006cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD5 10192 bytes
SHA-256: 6a744265baecb75c1c1ada3e8083ae009a3de048903fb861198bbe23d50f1ed8

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