Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5bfa6db4add904…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 20:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d8961ea633b47aed76642c5c07766f1 SHA-1: d2350baa6a44c158f976bc06c804574c0ccebff2 SHA-256: ce5bfa6db4add904f9defa09d0626c7b3edf7551368a0dc0b5d00064f2db47cd
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic legitimate document hosting, with a primary redirector URL pointing to known malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing numerous external links. The document body text is heavily obfuscated but contains the primary malicious URL.

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=core+curriculum+for+holistic+nursing+pdf In PDF document text
    • http://files.landmark165.com/uploads/1/3/2/7/132712185/tilidajizigukiz.pdfIn PDF document text
    • http://files.catholic-teaching-alliance.org/uploads/1/3/1/4/131407042/teroxefuzojulu_xapuka.pdfIn PDF document text
    • http://disebuzax.thepeacefulparadox.ca/uploads/1/3/2/8/132814930/xufumixidejudip-ninoma-nodetupap-nuvof.pdfIn PDF document text
    • http://lanukub.halesworthinbloom.com/uploads/1/3/0/7/130738714/pumeju.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/1/0430/9159/1321/files/rawekifozojog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/21047520378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/nafopur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/poviwijejikomuwufaluveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/43504582291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/93137523754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/role_of_caste_in_politics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/final_cut_pro_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/sizujezegob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/in_chemical_compounds_covalent_bonds_form_when.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 4

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_off000064f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 5264 bytes
SHA-256: 35ddfa1b00c86c7674f40a796445a187d6d18b8e5d678698610c322a5c95fa5a
font_01_sfnt_off000076b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 9976 bytes
SHA-256: 6dc50fde423fc4864681a43f6d1ca30959e2e1556ee6d4d60f5a164c1304f3d5

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