Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7b88c7717c95e4…

MALICIOUS

PDF

46.2 KB Created: 2020-08-06 01:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 236c5f1078dc1e63d1e901694fa82a6e SHA-1: 58c6145657212ba107401dea89b1e90710387227 SHA-256: da7b88c7717c95e4792e8e3fe22f092ec5906cb8e35de987d28c43a2ede21d4e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms this, indicating the document's primary purpose is to lure users to malicious infrastructure. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. The presence of a link farm suggests an attempt to game search engines for visibility.

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/pify?keyword=retinopatia+diabetica+bonafonte+pdf In PDF document text
    • http://nigaweva.vivacebu.com/uploads/1/3/0/7/130775320/kazawixubaxix_ziwaki_vizebezifuzaluz_pumeno.pdfIn PDF document text
    • http://files.koldblooded.net/uploads/1/3/1/3/131383651/vevatejidesol_bevuvegapudewe.pdfIn PDF document text
    • http://files.revomd.com/uploads/1/3/0/8/130814085/popezafi-juler-ponabe.pdfIn PDF document text
    • http://files.ontarioexplorations101.com/uploads/1/3/0/8/130873875/c4a2389a8.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/1/0437/8034/1917/files/empyrion_grow_light.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/jukilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/75127246996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/401352750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/zasebizoruxora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/dufaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/27303722123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/minecraft_missile_wars_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/14857809221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/fopugajimivaluvuwebesox.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 6

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_off000078ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 4992 bytes
SHA-256: f0b20fc94cc43980330d4181043082f07cfaca9efe77e42f595089e11f0ac057
font_01_sfnt_off000089bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BF 9888 bytes
SHA-256: b25407e25a8827a386d760726624fe57e0295bf703df575315816839b6fe2186

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