Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac906bee3be7daf…

MALICIOUS

PDF

39.3 KB Created: 2020-08-21 13:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74b22355f67b47e4e72fdab60ba05f20 SHA-1: 29951b332b918104423ec5dfa2443a628745e6fa SHA-256: 8ac906bee3be7dafa4d968b8ec2f8a9ef41e47e13b515cd8511d9c08a0d87fab
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=education.+com+spanish+worksheets', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure users through search engine optimization or direct redirection.

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=education.+com+spanish+worksheets In PDF document text
    • http://files.thomasgkelleylaw.com/uploads/1/3/2/6/132683140/dowun_relidedo_bagezatifo.pdfIn PDF document text
    • http://volufiz.23sneakerlounge.org/uploads/1/3/1/1/131163960/1881388.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/1/0432/2839/7728/files/luxamovesomuvusefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/jejoselipebatowoxufum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/reliability_and_validity_in_research_methodology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/56826999380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0825/3344/files/28900766206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/12080822542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6306/7032/files/58119885222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/koxuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/systme_digestif_anatomie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/vopodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/92362567899.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 2

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_off00005a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 5424 bytes
SHA-256: c8c972b269e174b90139f05989947eb6b7fab08fe1ecd2189d139b86ade87440
font_01_sfnt_off00006c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7C 10632 bytes
SHA-256: 403fa40c0912f778c4f7e2a4d10dc046f590457010df0c987902ff89adcaefd1

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