Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce77ab41e64595be…

MALICIOUS

PDF

39.5 KB Created: 2020-08-20 09:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8898082af8aa4abc6e9d87dcd53abf2 SHA-1: 0bd6e7bf36ae5f1e07567623507df4a48e6a54b9 SHA-256: ce77ab41e64595be44775705f89246172dc5827067c6fa1ea1da80623ec1fd14
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=dmards+list+pdf In PDF document text
    • http://files.thevillage.space/uploads/1/3/1/3/131380985/9d8418467.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/1/0435/9333/4947/files/9659308467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/15353943577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/70423916815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/destination_b2_grammar_and_vocabulary_with_answer_key_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9206/6709/files/larasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/23354315189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/83491627607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/buku_belajar_membaca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/jepaziki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/zibulivazatuwun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/pick_up_the_pieces_sheet_music.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 1

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_off00005d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 5188 bytes
SHA-256: dd7d88a86cfab3a7a66d5e8a13c40b2de3dc869d97ef107e1787673648d15bd6
font_01_sfnt_off00006eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 10220 bytes
SHA-256: 01817ecd706602ef27fe6ea3342932f24bfa373e3328fe1dc884e3c73d1b7086

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