Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef93d316e95cd300…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 20:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e4f243595e3919a1dd57fe69f64869d SHA-1: c5400f83cac0a59a85b0ee46d51976c01ced526d SHA-256: ef93d316e95cd30049004539fc0c3d246716a6e2291ff13d2ac84ad7a71fd8a6
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body text, though partially corrupted, includes the URL of the malicious redirector, suggesting an attempt to disguise malicious activity as a document download or information retrieval. The primary malicious link is https://ttraff.com/pify?keyword=valores+normales+de+cetonas+en+orina+pdf, which is likely used to redirect the user to a malicious site.

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.com/pify?keyword=valores+normales+de+cetonas+en+orina+pdf In PDF document text
    • http://files.neurodiversetalk.com/uploads/1/3/1/6/131637325/gemow_depukezabemona.pdfIn PDF document text
    • http://files.spanawaylakemonstersbbc.com/uploads/1/3/2/3/132302718/5586041.pdfIn PDF document text
    • http://leroru.firstbaptistnorfolk.org/uploads/1/3/1/8/131857631/7626697.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/1/0449/7352/3112/files/hernia_diafragmatica_congenita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/anemia_falciforme_en_embarazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/basic_synonyms_and_antonyms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/komplikasi_angina_pektoris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/pdf_giant_download_magazines_for_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/38398579090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/75136739001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/s_attribute_and_l_attributed_definitions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/dulunazikiwokalevamabume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/xasuwid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/49547984981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/minecraft_music_boxes.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 2

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_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5264 bytes
SHA-256: c401c3edbd815e2379f5a191ef55059f50d173ac248127d0cccb39353c93fb31
font_01_sfnt_off00007489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7489 11096 bytes
SHA-256: 48b2006786e2358d6baf5ff1fb2bb41eaa7a9be6238a91f28cc6cb34b891771b

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