Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0a877e21416aac…

MALICIOUS

PDF

42.9 KB Created: 2020-08-18 20:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 004adea25e0c8433618b8a7ce0ad3cb6 SHA-1: f22d0a77989ce701ddc6217659b273f081eb2109 SHA-256: 8c0a877e21416aac094440b70a21312f68493c4c3b7c5a2053b36f173e2f2aac
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'candlestick chart pattern' and a URL that matches the redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to malicious infrastructure via these links.

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=pdf+of+candlestick+chart+pattern In PDF document text
    • http://files.globalafricadiaspora.org/uploads/1/3/1/4/131454219/3710953.pdfIn PDF document text
    • http://movemuxek.khalsaacupuncture.com/uploads/1/3/1/3/131384635/bukokap_fered.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/1/0431/5650/4744/files/torowowuxeveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/63229841763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/cellules_souches_msenchymateuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/62354160522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/bookshop_automation_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/3d_exporter_for_autodesk_inventor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/acta_constitutiva_de_una_sociedad_civil_formato_en_blanco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/fizij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/panchatantra_stories_marathi.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 4

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_off0000684e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684E 5308 bytes
SHA-256: 126013a8bdab978581ebbe850ad4e636a10e748832f43f3ea4622327e7f302bb
font_01_sfnt_off00007a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A54 10860 bytes
SHA-256: 642c28d1c7f3c8dd258745d337dfaf202c3354a4110c5bfcd459cdc466a46b71

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