Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad802f7c53d846a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 16:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce93ba4b12020a59f47f15a46216f5af SHA-1: 9c4f05217fa542b1ac10b9823012533a92b03ea5 SHA-256: 5ad802f7c53d846af17923871eedd8bead16e0568f40cfc461eb7e3c4368cf01
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially corrupted, contains text suggesting a lure for a 'company logos quiz' or free download, which is a common phishing tactic. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL points towards 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=company+logos+quiz+ppt+free In PDF document text
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdfIn PDF document text
    • http://files.senalista.com/uploads/1/3/1/4/131411474/dogagojevifu_pumubeb_rewejotopuzodum.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/1/0431/1711/7589/files/39872691209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/38039433882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/72325102147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/5039576275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/bodiviwuzug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/eagle_scout_letter_of_recommendation_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5797/5191/files/vadoguro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/padewaperolokiwinejana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/wozupubifuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bogerewum.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_off000060f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 5404 bytes
SHA-256: 11fcfa9f6ca5445a227c635c630fad2924765157b8f1ee89363011504f7a3d21
font_01_sfnt_off0000734c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 10548 bytes
SHA-256: 944106da4464150265043760f4284f16f3c14d46aa4722138800edf6acdc10a7

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