Malicious PDF — malware analysis report

Static analysis result for SHA-256 212534133b928624…

MALICIOUS

PDF

69.7 KB Created: 2020-08-26 10:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bf1c36e7732ba9cc15a81f91480413f SHA-1: 36822d0b626ea347e455c07bc91385b466264586 SHA-256: 212534133b92862425f91b4f846691810f4cf77976c31b52e38adf25e693e8e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF was identified as malicious due to its inclusion of a link farm pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=they+cage+the+animals+at+night+summary. The document body contains obfuscated text and references to wkhtmltopdf, suggesting it was programmatically generated. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the final malicious destination or for SEO manipulation to attract victims.

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=they+cage+the+animals+at+night+summary In PDF document text
    • http://dunakojeg.artisan-creative.com/uploads/1/3/2/6/132695278/petapapawoxegenazen.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/1/0431/8016/3227/files/50606583516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/80070522754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/nomenclature_of_carboxylic_acid_derivatives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/89513037224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/17371680636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1966/8377/files/advanced_rar_repair_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/zizolavimove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/kevuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/16006925189.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_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 5264 bytes
SHA-256: 7f0ad5851f92dd996f337058c1916f4ec0f0261a683221b4bc9f1d759ef1aae1
font_01_sfnt_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 10156 bytes
SHA-256: 60368d6ca0510be3b1e641302385ae12c4884d4d734a067b73421e6f7ad9f149

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