Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4af0709b81695d0…

MALICIOUS

PDF

39.3 KB Created: 2020-08-12 05:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75f4aeea60c9ada291a9cf3ba852097a SHA-1: b89b6250641c6d6566ad17cb6029712576a7954b SHA-256: e4af0709b81695d0474af7c324f8ddb34c6a511651c4147376ca2cdbb68e9b7e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though garbled, contains text related to 'customary units of measurement worksheets 4th grade' and the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. The presence of a link farm and a redirector indicates a clear intent to direct users to potentially harmful external sites.

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/wb?keyword=customary%20units%20of%20measurement%20worksheets%204th%20grade In PDF document text
    • http://files.infusionwa.com/uploads/1/3/1/4/131407164/bibizezesipolag.pdfIn PDF document text
    • http://files.deepanikennel.com/uploads/1/3/2/7/132740549/e01ebfb32574985.pdfIn PDF document text
    • http://vasajet.raspberrytours.com/uploads/1/3/1/6/131606289/negotedidiwa.pdfIn PDF document text
    • http://files.madewithartandsoul.com/uploads/1/3/1/8/131871864/wurimato_jabesogoxagiz_gafolupated_kitejikawujas.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/1/0435/2560/3488/files/kikekibamekuvemonevewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4788/6743/files/19637400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25843483079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/caiib_risk_management_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/biblical_understanding_of_marriage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/13826243007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/15598178794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/tart_altered_states_of_consciousness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/71614647276.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 1

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_off00005b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B14 5540 bytes
SHA-256: 7ee1df408f05f80bb0b250e49c23021029892b6670cb5610b07dd55c2520345d
font_01_sfnt_off00006deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEB 10044 bytes
SHA-256: fb0eed84613182d8d70d90670042b0425c41fa8c7d11d0e0f46e6a8073d05eec

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