Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c0de243f37b600…

MALICIOUS

PDF

53.4 KB Created: 2020-07-30 04:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0bb538b4ef3cf8ef6e477a4c126b6aa SHA-1: 6d2b2f759614991c361335ea897d2989d84f1783 SHA-256: f8c0de243f37b6000ee145318b6414f99d75f81248b1e859b3fa7cc2c3e5540a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, with one heuristic specifically identifying a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body is largely unreadable binary data, but the presence of numerous links, including one pointing to a known malicious redirector, suggests a phishing or malware distribution attempt.

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=leaders+are+born+or+made+discuss+pdf In PDF document text
    • http://files.indipix.co.in/uploads/1/3/2/6/132681368/suzepemolaluzi_zomiguwop.pdfIn PDF document text
    • http://files.cathclip.com/uploads/1/3/0/8/130813526/9419601.pdfIn PDF document text
    • http://files.abbi.ca/uploads/1/3/2/8/132815388/ec4634d5fb6857c.pdfIn PDF document text
    • http://files.julianamatsumura.com/uploads/1/3/1/4/131437779/wobojuwubixonepun.pdfIn PDF document text
    • http://files.ecigsuperstores.co.uk/uploads/1/3/1/4/131407511/4eecf9e35d33.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/1/0428/1637/2892/files/74791163565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/pujagugeseroxeluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/18168325659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/30133915030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/85805135328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/965075749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/14055050170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/fesukisadav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/57016918118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/tebimigugir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/13894167204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6087/9782/files/89699375752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/tositemokitevik.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_off000093d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D0 5152 bytes
SHA-256: e6034c822c2e12bbc2bb1e95f3157d9b9a04499d8d3bc4e508470ef35c382e20
font_01_sfnt_off0000a52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA52E 10148 bytes
SHA-256: d31ce3bb27d1098bb621423ea655c1f4455e8795ff13cee8e1a9fcdd31271dde

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