Malicious PDF — malware analysis report

Static analysis result for SHA-256 88945a13544822aa…

MALICIOUS

PDF

54.1 KB Created: 2020-08-10 17:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd8fa018c4b92172c036ac500bc4467f SHA-1: 75880a2f669e5f26baa5363729c42bf1c6c84542 SHA-256: 88945a13544822aa27431b0114c0086c13baf938220c4e1414e3301a3154cbe0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector, specifically designed to lead users to a link farm. The embedded URL and the document body both point to a redirector URL, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=banting+food+list+pdf In PDF document text
    • http://files.guardiantraining.co.uk/uploads/1/3/1/4/131438180/nebikosoru_junelo_jonejizig.pdfIn PDF document text
    • http://files.bellanoirclothing.com/uploads/1/3/1/8/131858916/1454211.pdfIn PDF document text
    • http://files.octaskhoppers.com/uploads/1/3/1/6/131606502/9347302.pdfIn PDF document text
    • http://files.madamedrydensgrade5class.com/uploads/1/3/2/7/132710797/monomiwisap-ravub-zosagezubepako-jurimowekol.pdfIn PDF document text
    • http://files.morriswomansclub.org/uploads/1/3/1/6/131606366/gilabopuveloredi.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/1/0431/3019/2039/files/10809647467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/bipekorarudetuxuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/87701713442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/71479227101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/unicode_character_symbols_emoticons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/tukaxutubijakibavekoligej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/riscos_ocupacionais_em_odontologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/need_for_speed_prostreet_platforms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/miocardiopatia_hipertrofica_dilatada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/application_for_citizenship_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5836/3558/files/20102473099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/29475019788.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_off0000959f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x959F 5160 bytes
SHA-256: f043781651e553615f0e3bc30fc3af67b5bf54b066422c27f848467af97c9875
font_01_sfnt_off0000a743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA743 10608 bytes
SHA-256: 48e7eb276a5178a6b8a38b406fb1c1d86eda75e62c91e5ce10054d0f3fc05bc3

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