Malicious PDF — malware analysis report

Static analysis result for SHA-256 21364f85bd02cdea…

MALICIOUS

PDF

54.0 KB Created: 2020-08-09 11:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 692578b0c3d98d32d7c6d2ea88d1e6cd SHA-1: e4e955de5712629cc9a3b726cc838feafc714308 SHA-256: 21364f85bd02cdeadfdbe5797d4cc459b6ac389e08cbe81f52f70a9b09a28f5b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/pify?keyword=antigeno+helicobacter+pylori+en+heces+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The file's purpose is to redirect users 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.ru/pify?keyword=antigeno+helicobacter+pylori+en+heces+pdf In PDF document text
    • http://files.ywamkaikoura.org/uploads/1/3/0/7/130740018/42111800.pdfIn PDF document text
    • http://files.carolsullivanperkins.com/uploads/1/3/1/0/131071252/zusafilepege_katimoxugepiw.pdfIn PDF document text
    • http://files.broadwaystreetwear.com/uploads/1/3/1/3/131383698/fd7b8897.pdfIn PDF document text
    • http://files.janellrubyoga.com/uploads/1/3/0/7/130738614/juzonetajofopidez.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/1/0428/1552/0935/files/vuneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7069/3282/files/90530378827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/59880771342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/7859631620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/8567344216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/33806601418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/mipoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/lugafuxinoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/46673365864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/42684400036.pdfIn PDF document text
    • https://medlineplus.gov/helicobacterpyloriinfections.htmlIn 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_off00009380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9380 5648 bytes
SHA-256: 36bc667058f59be836228c9903e8e5d6ca1fef8030aac01f77dec74aec662e53
font_01_sfnt_off0000a6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B5 10756 bytes
SHA-256: e80c8f6b36461e1a9ba8a7849a7fc7541d7f356c92132a5af7f2fad1383c2f12

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