Malicious PDF — malware analysis report

Static analysis result for SHA-256 4426170e5bfe6866…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 03:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ec8aa5a88c337d9b0a6677abe9bb419 SHA-1: 00c65abad999559ca01a791b1bfadaecc2e582f9 SHA-256: 4426170e5bfe68663d3da6d51a5530aaf33cb76c33633885255537a7b5af25fc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as malicious redirectors. The document body, though partially corrupted, suggests a lure related to educational materials. The ML classifier strongly indicates malicious intent, likely to drive traffic to malicious sites for further exploitation or phishing.

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=active+and+passive+voice+worksheet+for+grade+7+pdf In PDF document text
    • http://lusixuwe.threeriversstudio.com/uploads/1/3/1/4/131406390/4911183.pdfIn PDF document text
    • http://files.studiotrevorparker.com/uploads/1/3/0/8/130813736/c645f06fa595b.pdfIn PDF document text
    • http://files.bespokecarpentry.org/uploads/1/3/1/4/131409677/dorasosepufokaj_kepofa.pdfIn PDF document text
    • http://files.gwrra-iowa.com/uploads/1/3/0/7/130739457/fijijofanisis-gobejago.pdfIn PDF document text
    • http://vomojipo.intheam.shop/uploads/1/3/1/6/131607029/wabaxig-fagut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/52565642541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/ancova_example_problem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/accounting_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/96560629471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/rubitebavinuwiriko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8781/4044/files/giwalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1328/8614/files/antenna_design_using_matlab_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/mixobidasipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/484573782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/introduction_to_applied_mathematics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 5456 bytes
SHA-256: 977bc157b0a666b9b70c54c38938a60ab91ef29ec372dc11058df2090afca941
font_01_sfnt_off000076ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 10332 bytes
SHA-256: e3786c01bbe3e7e0d54fb6fcb77c390730d627900e4a07d3e5e6dd068bfd74ae
font_02_sfnt_off00009a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A08 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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