Malicious PDF — malware analysis report

Static analysis result for SHA-256 259176d7b20aa543…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 15:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92cd6ca577f291c1dad31147a41e8968 SHA-1: 9c84fbd5a0d06eb77a813fbb1b52e79281c214ae SHA-256: 259176d7b20aa543c7444d441ceccf11f6cec76d67b7f179f18a173efb1fe2db
214 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, with one critical heuristic identifying a malicious redirector. The document body, though malformed, contains text related to a 'worksheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.cc/wb?keyword=suffix%20ness%20worksheet%204th%20grade, which likely serves as a gateway to further malicious content. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/wb?keyword=suffix%20ness%20worksheet%204th%20grade In PDF document text
    • http://files.piedmontlandscape.org/uploads/1/3/1/4/131453648/92343075.pdfIn PDF document text
    • http://files.learningforcharity.ca/uploads/1/3/1/4/131452735/3011405.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1010/5255/files/bupejelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/kiralite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0469/5452/files/bnf_75_2020_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/rixutob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/linguistic_typology_morphology_and_syntax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6967/6451/files/82496323592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/foniropugaboxivadolikijip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/sinifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/zunesilinukozejoxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7C 5436 bytes
SHA-256: 01370a2f80a3c86abaa209c5d5034dbc53f044e8944f28b31258ecaf2c0b900e
font_01_sfnt_off00005e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 9852 bytes
SHA-256: 5f547e739b99e1445a157c605622c6177aaecb46477e0e32ce0a82faacd9134f
font_02_sfnt_off00007fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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