Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4de8f37303140a6…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 01:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9ea63ea71fbdca78a0b7e65540fbc1d SHA-1: 75cdfc45fd3792eca7c15ce39981a8146ef0b0d6 SHA-256: e4de8f37303140a6d4678d52339f67b8274af2b4f260b90520541aad521df555
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that is also present in the heuristics, pointing to a known malicious redirector. This suggests the PDF is designed to lure users to malicious sites, likely for phishing or malware delivery.

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.ru/pify?keyword=canon+camera+app++for+android In PDF document text
    • http://kexure.train-to-nzeb.com/uploads/1/3/2/6/132682137/rawow-mujekunejamok-dubisima-fexow.pdfIn PDF document text
    • http://files.thewindisfree.co.uk/uploads/1/3/1/4/131453114/5356475.pdfIn PDF document text
    • http://files.hansogrenphotography.com/uploads/1/3/0/8/130874295/lipopavotidawese.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/1/0428/6421/4182/files/24538695615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/fazafibadibitefuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/xiradamurov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5129/files/53786207008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/turnigy_9x_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/xivopifumozuzija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4299/5367/files/10711913038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/zedejojul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/xubibapebuma.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_off00005cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFD 4996 bytes
SHA-256: 112f05af53f56de3c61aaa3c9ad65a24867f017327311db3ec17af12860566fb
font_01_sfnt_off00006de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 10168 bytes
SHA-256: 3f03c371061b921032e5d135a5326c1979ae8b853f3782579fd2105f0d4dbfcf

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