Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c95da096caffa0…

MALICIOUS

PDF

48.6 KB Created: 2020-08-05 17:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b2f373a5a312f0f4df4d4a434280d65 SHA-1: 02542f28d1cbacdfbc348c5fd6d28a664b354e8d SHA-256: 22c95da096caffa0103aba8b6de46cb0e63e329c1d9a392440bf6b96feb3c529
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as academic notes, but the primary link redirects to a known malicious redirector. The document body itself is heavily obfuscated and contains the malicious URL. The presence of numerous external links to PDF files hosted on various domains suggests a link farm for SEO poisoning or traffic generation, ultimately leading to malicious infrastructure.

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=artificial+intelligence+and+expert+systems+notes+pdf In PDF document text
    • http://files.lesbiansinfleeces.com/uploads/1/3/2/6/132696171/xuxulikalagu_benuworoza.pdfIn PDF document text
    • http://jedulega.shawnsaumell.com/uploads/1/3/0/7/130775735/222af.pdfIn PDF document text
    • http://files.dontperish.com/uploads/1/3/0/7/130740012/vofudi.pdfIn PDF document text
    • http://files.desertjade68.com/uploads/1/3/0/7/130739415/xodinat_razegirabovugo_mibug.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/1/0433/5704/4890/files/dogosidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/38918869212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/53710453689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/xujiwukunuvaxabekenufofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/pudido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/essentials_of_corporate_finance_ross.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/3725910487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/fofuzinazusanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/vopozan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/gigotijezakisirokup.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_off00007d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 5636 bytes
SHA-256: 809ab72a24c0359ad60e1dfe2aaa566f68c3a6d914de1a51470d41c66029453e
font_01_sfnt_off00009072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9072 10764 bytes
SHA-256: e13a6299bfe63aa695db392a92b57fa7a125c6099f0b754f0e661f474d9b6344

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