Malicious PDF — malware analysis report

Static analysis result for SHA-256 66de3cfaf350d7f7…

MALICIOUS

PDF

56.7 KB Created: 2020-08-18 13:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc5161da4cd2f35dbc2458a0b1b62d00 SHA-1: dd5f134c7809128dbdc7cb7049328394759ad010 SHA-256: 66de3cfaf350d7f7c7f6099fcfdbc7b6ceb67020d84a8cb27a6dd8635d3f947b
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised as a 'college loan calculator excel template'. The heuristic firings indicate that this is a malicious redirector and part of an SEO link farm, likely designed for phishing or malware distribution. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics and IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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.com/pify?keyword=college+loan+calculator+excel+template In PDF document text
    • http://nujufedep.aowyn.photography/uploads/1/3/2/8/132814930/a25dfb5df19.pdfIn PDF document text
    • http://kajuza.oceanescapestravel.com/uploads/1/3/1/4/131437657/7761342.pdfIn PDF document text
    • http://files.oxfordgardendesign.com/uploads/1/3/2/7/132740852/5fec27.pdfIn PDF document text
    • http://files.allseasonsafaris.com/uploads/1/3/1/6/131636655/lolikejinak.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/1/0437/9151/5805/files/centrifugal_chiller_operation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/nevagonukuvenaminajeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/76039768828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/xuxegufexog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/computer_embroidery_designs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/5_august_2019_weather_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5093/2123/files/31859714027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/template_id_card_portrait_cdr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/renotewunes.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 3

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_off0000a029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA029 5048 bytes
SHA-256: 429b626d244dbfeee0635e2006fd510ccdec5235c646f1ba0d6c3fb686c424b9
font_01_sfnt_off0000b149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB149 10656 bytes
SHA-256: e078b3cac4f11b1403cf538ddae296a98fc4b8f2fb240086532746e2a3e21ab9

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