Malicious PDF — malware analysis report

Static analysis result for SHA-256 8736464562e6b9f0…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 01:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab0042c5d5621859ded4a2b4f616bfe5 SHA-1: 98666bb8f52ff988b6b1e42752119458370c517c SHA-256: 8736464562e6b9f072bcb3de1355049f4361b035a845094f0d31668b4566f6de
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for hosting malicious content. The document body and heuristics indicate a lure for free downloads, likely leading to malware or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=algorithms+illuminated+part+1+the+basics+pdf+download In PDF document text
    • http://files.brittanyleal.blog/uploads/1/3/1/3/131380848/zavidunema-fibujupe-jevulur-sepusibodidedum.pdfIn PDF document text
    • http://files.daniellekelleytolbird.com/uploads/1/3/2/7/132740778/836e3.pdfIn PDF document text
    • http://files.legendgolfcompany.com/uploads/1/3/1/0/131070459/8509951.pdfIn PDF document text
    • http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdfIn PDF document text
    • http://gaxafisub.lauranaomiartisan.com/uploads/1/3/2/7/132712358/welanelopawox_vinuma_bifitove.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/1/0428/9105/1164/files/envision_math_grade_4_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/energias_renovables_introduccion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/20727223954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/77603359417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1018/5637/files/modern_geometrical_optics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/wuton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/psychology_of_colors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/reference_letter_for_teacher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2164/6498/files/sinuvazixagerijijoxepo.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_off000054f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F1 4172 bytes
SHA-256: f70bd9bb9cdb23e61296a78e5f42b02c99e94020c7e2624fff29e7a46b125547
font_01_sfnt_off000063b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B5 5844 bytes
SHA-256: 45568dd19c0970231fdb8325804cc68b9d61ce8b5e86a1e16f6121c236e1b9a0
font_02_sfnt_off0000777c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777C 9912 bytes
SHA-256: c62ef63fe5d610613e1ae927ce052b2a143ad02713481858835b059e830ac89a

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