Malicious PDF — malware analysis report

Static analysis result for SHA-256 6735bae252c9193a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-10 16:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36ba51bc54282c61930b279a6085c3dc SHA-1: faadbcd31e7c9c88a2955963cc1f47c6be906386 SHA-256: 6735bae252c9193ad8324c6bbee7de0e680989c18ea33fce339ab59c1bacb0cc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a redirector service, suggesting a link farm or SEO manipulation tactic. The document body text and embedded links indicate a lure for free PDF downloads, which is a common phishing or malware distribution technique. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=barman+in+red+libro+pdf+descargar+gratis In PDF document text
    • http://files.greenremediesnj.net/uploads/1/3/1/4/131483492/e527756672efea.pdfIn PDF document text
    • http://rakimigej.karapaints.com/uploads/1/3/1/6/131606289/pefesatuxis.pdfIn PDF document text
    • http://fisoxisap.kidfoodiecolumbus.com/uploads/1/3/2/6/132682076/5080525.pdfIn PDF document text
    • http://files.jacobwetterlingfilm.com/uploads/1/3/2/7/132740982/dbfa18218.pdfIn PDF document text
    • http://files.kimanidolls.com/uploads/1/3/0/9/130969158/vunewifar.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/1/0440/5549/4806/files/prentice_hall_chemistry_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/vadisamok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/fuzulivazagajel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/85157757749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/finozugitipifigaraweluwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/72518973881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/jowurogajelidega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/convert_from_to_word_arabic_language_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/doxalakusoxoweka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/sisawixilunuwekesugeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/66622406360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3982/9661/files/interior_design_for_small_house.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/minecraft_giant_oak_tree.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5573/4166/files/88120296408.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_off0000640b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5664 bytes
SHA-256: 3e535c0c2371de574088defdebdbfa6abbd6d9f1e236b94ed7e5208d607ea537
font_01_sfnt_off0000772c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 10244 bytes
SHA-256: d7ccd8b58682330560a23a04369ef7b641c91a1a76257895569c0f7a68f1ae8b