Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded8f541ac422c8f…

MALICIOUS

PDF

52.6 KB Created: 2020-07-22 13:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cca949ccd37c5f7c21387362a7e16712 SHA-1: 2eacb4dfad348b9873ae35bcbf0bafa28d227dd8 SHA-256: ded8f541ac422c8f3ee755e3351da6c7800b2e5201f3b84d510e7867e489706f
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to Shopify and WordPress domains, but one critical URL leads to a known malicious redirector (ttraff.com). This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'baixar livro psicose pdf' and the authoring application 'wkhtmltopdf', indicating a potential lure for users searching for specific content.

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/wb?keyword=baixar%20livro%20psicose%20pdf In PDF document text
    • http://files.manchesterlifestyleawards.com/uploads/1/3/0/7/130739826/dawatojobiwoxefu.pdfIn PDF document text
    • http://files.iskphilippines.net/uploads/1/3/1/8/131871772/duxosew.pdfIn PDF document text
    • http://files.msdlaroche.com/uploads/1/3/0/8/130813095/ddae113.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/1/0430/7006/2754/files/50935764776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8182/files/maximuzibizuziwadel.pdfIn PDF document text
    • https://jidibabeja.files.wordpress.com/2020/06/73250404353.pdfIn PDF document text
    • https://vilisawep.files.wordpress.com/2020/07/44834811776.pdfIn PDF document text
    • https://geditoka.files.wordpress.com/2020/07/19573798612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3205/9810/files/68800365162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/708902875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/kuxuvedenuzuresunezuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/59657547861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/bomojejituboki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/71168953933.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 8

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_off000080cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 4928 bytes
SHA-256: 270ace85c5714f6b15d6be754526318035075b0844fe2328528a5609ea057c1e
font_01_sfnt_off000091a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A3 17552 bytes
SHA-256: 7968a8dbb5d28a37579d39e15042940ec5982d0968501132361f0a18898a157f

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