Malicious PDF — malware analysis report

Static analysis result for SHA-256 1642c6e3ae915f99…

MALICIOUS

PDF

40.6 KB Created: 2020-08-09 13:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 463fce6b045bdf349007028f8960231b SHA-1: af48727e4357f07302c406af488c3108842cbd4b SHA-256: 1642c6e3ae915f997d8b4624208f0e8e1f07d9770d3e715c2ab8e9d67aac00dc
202 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic firings suggest the document is designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ancient+egypt+gods+worksheet+pdf In PDF document text
    • http://files.mrscooksclass.com/uploads/1/3/1/0/131070178/3420aaff2d6e5.pdfIn PDF document text
    • http://files.mindwellmarketing.com/uploads/1/3/1/3/131398542/0adeb74c9e7d.pdfIn PDF document text
    • http://files.ponyexpressgamez.com/uploads/1/3/0/8/130874377/1390004.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/1/0428/4848/5535/files/fuxibupavemotupejeweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/printable_weekly_planner_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1107/5222/files/vocabulary_for_ielts_collins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/16876439474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/75723462403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/69255326854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/zibigozebimeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/brennan_manning_ragamuffin_gospel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/nanepukusujoburazisirixes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/maxims_of_politeness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/zawodivefokelupirumebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/4709379777.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 6

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_off0000622b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 5420 bytes
SHA-256: 9d3bd05149094eeafa0bb3db362ec5c322b5c6874e7c22b74f6d3c2b1edd8aa4
font_01_sfnt_off000074b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B9 9596 bytes
SHA-256: f54a1a315da862fa38cc584eb5245809082392276dc21fd8f5b00110a93eade6

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