Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cea858834cd35c…

MALICIOUS

PDF

44.1 KB Created: 2020-07-31 06:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27b5c140a5efb64b8a0b7f5027c49a05 SHA-1: 7b30a9ebe13557ee2a6185dc13b39054f7b204b6 SHA-256: 72cea858834cd35c2cc0853330bbece936eccdf9f6ea5065f7ccdf473b4bbdfc
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a redirector link pointing to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure for free downloads, which is a common tactic for phishing campaigns.

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=oxigeno+disuelto+en+aguas+residuales+pdf In PDF document text
    • http://files.lwemporium.com/uploads/1/3/1/4/131453897/e5c8935da5149.pdfIn PDF document text
    • http://files.devonatanner.com/uploads/1/3/0/7/130739810/ce1efccab.pdfIn PDF document text
    • http://files.hansenmath.org/uploads/1/3/0/7/130739404/wafotepe-mabinamisuj-jaxosaleguboku-mesojupapoton.pdfIn PDF document text
    • http://files.puriri-wiltshire.co.nz/uploads/1/3/1/4/131436991/xenesadodega_lozaxedevo_libisawerab.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/1/0431/6472/9512/files/vesuwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/23543333952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/51907488151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/84473734593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/nolatujabiditiwapizus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9064/files/22219364961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/99745223863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/21389407168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/nuritiwadagovujifolan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/suvedojuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/fikopupejup.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 5

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_off00006ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 5188 bytes
SHA-256: a97d24714c76736cb80a273d0b82580d1d92889a0fd07ad60ceb72200a2d634f
font_01_sfnt_off00008074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8074 10212 bytes
SHA-256: 35c528425a5a128950f1c7d1e63c51860d1558d74c4e798a0fee247e132437c2

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