Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9886b143f41f3b…

MALICIOUS

PDF

47.9 KB Created: 2020-08-22 22:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fea91df0b265d0217a454e2a10b7f76 SHA-1: 2576d7f3b45f31e143dcc52be56b69cfef4f4089 SHA-256: 7f9886b143f41f3b9befffc915a1d57d12cc003cb5057bc8c3b3c7ce5efdb3ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution.

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=democratic+centralism+pdf In PDF document text
    • http://files.joyfulsoundchoir.org/uploads/1/3/0/7/130738769/9229011.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/1/0428/5923/3443/files/17919362093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/i_9_acceptable_documents_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/81103816759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2630/9543/files/barcos_que_vuelan_imprimir_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/20670801288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/83567922850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/fenibilugefalusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/2011_gmc_acadia_reviews_consumer_reports.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 5

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_off00007d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 5300 bytes
SHA-256: b77c0847456b76d135ece6578a9d839554845e1e2e9cc7efa70eae295050cc18
font_01_sfnt_off00008f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7F 10376 bytes
SHA-256: efaf3757a9140380d9bc6682b97171e2858726d0809ba00a67680636869a40d2

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