Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e500769d577cbf2…

MALICIOUS

PDF

41.2 KB Created: 2020-08-13 17:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d89823c88984db564cfd5ac06ee1b86c SHA-1: 392ee2117e0a431ca9033d1055985c3b8bc14337 SHA-256: 5e500769d577cbf29e4d74adf2f6fa35a5df457c7e8e7db6e45df8316b1bdc3e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links disguised as a coloring worksheet, aiming to redirect users to a malicious site via a redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a link farm or phishing campaign. Although no scripts were directly extracted, the PDF structure itself facilitates the malicious redirection.

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/wb?keyword=animal%20cell%20coloring%20worksheet%20quizlet In PDF document text
    • http://files.worldreadyschools.com/uploads/1/3/0/9/130969907/palirumopavatej-nitiz-diloxomagusap.pdfIn PDF document text
    • http://files.utspta.org/uploads/1/3/0/9/130969477/goned.pdfIn PDF document text
    • http://files.chicagocitylimits.com/uploads/1/3/1/6/131606280/da13cf5bd5a68.pdfIn PDF document text
    • http://files.centerlislecongregationalchurch.org/uploads/1/3/0/9/130969791/1e8b3e5b790ba.pdfIn PDF document text
    • http://nikudapa.yorkshirecheesestall.com/uploads/1/3/0/7/130775934/gitarojudal_levoguwoses_juwaz.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/1/0432/1977/9741/files/bug_dragon_pokemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/4976603100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/niwizamezakemulif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7804/9189/files/towesogisugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/jojofojupudalif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/20096947836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/22330087508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/58381739490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/14759884691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/gst_annual_return_gstr_9.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_off00005f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8C 5536 bytes
SHA-256: 1566f87b2fa2c87e4b657f25330fc2305d00bb0eca1460ec9b1d7c35d7dd9d72
font_01_sfnt_off0000723b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 10872 bytes
SHA-256: cfd5039cfa785028643512fd889501f7bf9c7f14c516e8ed0eb887264cc48feb

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