Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd20bfc8220deeb3…

MALICIOUS

PDF

36.5 KB Created: 2020-08-05 07:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6f77fea82b531f9293eab3106240fd4d SHA-1: cb9146f8ca79a6d008191b1319f246b9553b2c93 SHA-256: cd20bfc8220deeb373a4a0cad40ecc50594a8f2d77fb3255fe06aabdf1fec822
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, with a critical heuristic firing indicating a link farm. One of the primary links, https://ttraff.ru/pify?keyword=advanced+transport+phenomena+john+c.+slattery+pdf, is flagged as a malicious redirector. The document body also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a tactic to manipulate search engine results or distribute further 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.ru/pify?keyword=advanced+transport+phenomena+john+c.+slattery+pdf In PDF document text
    • http://files.chloescheel.com/uploads/1/3/0/8/130813042/5d7fab6f.pdfIn PDF document text
    • http://files.henryhomes.site/uploads/1/3/0/7/130776828/kixirusi_kinopaxo_bokikomowi.pdfIn PDF document text
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdfIn PDF document text
    • http://files.evolvedathletix.com/uploads/1/3/1/6/131607662/3379465.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/1/0432/7368/3100/files/93156113305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/fozevodara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/40958868252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/hayne_manual_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/23843293127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/72199656790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/voluwifimagetufezojop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/half_elf_5e_variant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/rajulipepudekopuneluke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/21166826193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/xurogupota.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 8

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_off00004f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6A 5656 bytes
SHA-256: f4bac9c761fa675cacb29d03c41d8c7de8cdbb3226bf2ff5c0e7dbc5da1ad85c
font_01_sfnt_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 10064 bytes
SHA-256: adc02308b658d19662b710153245593fe566eab15da20820b4a2f110ca5206dc

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