Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc67f4f69b46049b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-12 08:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7b17c266ce3a01dc75bdf0e007d8d35 SHA-1: 529d3102d0b9d1e6ab2f788a3c15358ede7617b5 SHA-256: dc67f4f69b46049b938bbc7205d62e2920c02d40e91935bc4906b5b312971622
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'chair yoga poses for beginners pdf' and the malicious redirector URL. The primary attack vector appears to be a lure to click on a link that ultimately leads to malicious content.

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=chair+yoga+poses+for+beginners+pdf In PDF document text
    • http://files.keirhardiesociety.org/uploads/1/3/0/7/130739719/82a523be92b.pdfIn PDF document text
    • http://sirisa.cchsmo.org/uploads/1/3/1/1/131163494/5613701.pdfIn PDF document text
    • http://files.missrosieweddingsandevents.com.au/uploads/1/3/1/4/131453194/0cacec15fe3.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/1/0431/3730/2679/files/abcde_rule_melanoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/wexifubereki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/the_art_book_big_ideas_simply_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/92427754144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/anlise_do_contedo_bardin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/23432213894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/xagevajajofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/nueva_biblia_de_jerusalen_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/reduce_size_of_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/rapugen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/move_multiple_files_linux.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 3

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_off00006a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A41 5416 bytes
SHA-256: 50a4374b122e06b0f9d8b94a22ccff98759e0cfb341f41fe4cc14133a2bbadd1
font_01_sfnt_off00007cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAB 10436 bytes
SHA-256: 59ec93bd7ff675b81ef517d0fa27e596f591e5acf47d4065d459e055835bb22d

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