Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c7c42e54db73fe…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 15:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92caf61decdad44d9c34c455b7ccfe13 SHA-1: f48217f0065172c55a62273ffb62c3f9aab7de7c SHA-256: 90c7c42e54db73fe7b4d8863ae1bba715d099640d9fa1253c9ca232711ac88f9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic firing identified a direct link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=coliformes+en+el+agua+pdf. This suggests the document's primary purpose is to lure users to malicious sites, likely for further exploitation or phishing.

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=coliformes+en+el+agua+pdf In PDF document text
    • http://files.gofitathlete.com/uploads/1/3/0/9/130969776/jujalajumeda.pdfIn PDF document text
    • http://files.anthonygibbs-art.com/uploads/1/3/0/7/130775868/170bffd5dfa.pdfIn PDF document text
    • http://files.vistapeaklbasketballgirls.com/uploads/1/3/0/8/130814112/c7e6a5a203.pdfIn PDF document text
    • http://files.shopdsr.com/uploads/1/3/2/6/132682892/1781198.pdfIn PDF document text
    • http://files.cchsny.org/uploads/1/3/1/6/131607054/pudikazukaf-fisasopi-rekikuki.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/1/0435/0646/6982/files/va_form_21-_0845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/7084038392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/1996_subaru_outback.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/derarufopim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/scanned_to_word_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/30390144234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/11_batho_pele_principles_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/gukobinak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/98592309970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6704/7077/files/17218830115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/55362451418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/wesomivikaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/88251242379.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 7

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_off000067b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B7 5268 bytes
SHA-256: b70137077f1dbe9bd2c67a52e339094380f90495f1c4554cf2d9efc8cfe5fb9e
font_01_sfnt_off00007987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7987 11404 bytes
SHA-256: 32a3792607342c16e699ea2954f477b52e5bff549f0a1b9ebf9037c6ae3278af

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