Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9e25a0d478129f…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 18:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 585a4329e41e90368b3d5a818e16b890 SHA-1: 0a05620749faae312544309a0dd0cf5cf16809bc SHA-256: fb9e25a0d478129f3611f7a41772a41425541699391450a83c4574e7cc01b1f9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=cambridgeshire+school+admission+form`. The document body, though partially corrupted, also contains this URL and numerous other links hosted on `cdn.shopify.com` and various other domains, suggesting a link farm or redirection strategy. No scripts were extracted from this sample.

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=cambridgeshire+school+admission+form In PDF document text
    • http://files.halseyband.com/uploads/1/3/0/8/130813876/jerigegipurak.pdfIn PDF document text
    • http://files.victoriapowersstudioten.com/uploads/1/3/1/6/131636819/d7924c.pdfIn PDF document text
    • http://files.asim-lab.com/uploads/1/3/0/8/130813111/dujasomibepedos_modetobowawokuz_mozej.pdfIn PDF document text
    • http://files.soapboxstudios.com.au/uploads/1/3/0/9/130969089/9c40888174.pdfIn PDF document text
    • http://files.guideturisticheancona.com/uploads/1/3/1/4/131407080/dinagukeb.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/1/0433/9168/0673/files/solidworks_routing_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/teburaropiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/26862331677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/52214580136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/76036051649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/74748979756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/calineczka_ba.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 4

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_off00005b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 5480 bytes
SHA-256: 83347d83dbb3d91c5028d05d087913e532008d79ace22389fb2fd4efda2dad3f
font_01_sfnt_off00006e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 10036 bytes
SHA-256: 0f19e6f648cfa632b64b1ebab4c65976c83c170385a514a4c3a58dc4c1ed1b73

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