Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f38c05aa20dca94…

MALICIOUS

PDF

57.1 KB Created: 2020-09-09 02:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2047b33b1abfe4d9d510f792efee402 SHA-1: df1ac2a42401b43acb634ed37626663fa859888f SHA-256: 8f38c05aa20dca9409956543a2b310a1a2b503f0db4082e3a5475f2e7e1be7b4
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including linking to a known malicious redirector and acting as an SEO link farm. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to trick users into visiting a site that likely hosts further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.me/wix?keyword=antivirus+portable+usb+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/430cb2_993adfcdd2b046a7a217c77e77df903b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/565485_4accba5badec43128579cf325fa7140f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f4de5e_e69bf68b32fa4cd19a764f5a45fccd69.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1851/7665/files/jezal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5550/0712/files/85236274587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/dremel_grinding_stone_color_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/jifuposugobabiselatug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/kopikarik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/visualforce_developer_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/moment_js_format_more_than_24_hours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/74021392312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/jalovalupop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/usmc_survival_manual.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_off0000a3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BC 5084 bytes
SHA-256: bf9804e2bf3ae3313e69adf7a61c59a975431eee40cb61353bdfc441207c813c
font_01_sfnt_off0000b51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51A 10144 bytes
SHA-256: 267e64395f637d22fa3e31d9d70df7b6329831606e3cab766c320938bed5a272

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