Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebffeecf16bf23a9…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 00:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e79ef31d69a13640fa08919036da915e SHA-1: c84ed137f0af4772ace98e54fbbefe88693e0d25 SHA-256: ebffeecf16bf23a953a61abf73c7ae293873f4ee64a4725e48802781350a8268
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a document about the 'third law of thermodynamics' which redirects to a malicious URL on 'ttraff.ru'. This heuristic, combined with the ML classifier's high confidence, indicates a phishing or redirection attempt. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm used for SEO poisoning or to obscure the final malicious destination.

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=third+law+of+thermodynamics+pdf+nptel In PDF document text
    • http://files.fiveanimalkenpo.com/uploads/1/3/0/7/130740180/kagew.pdfIn PDF document text
    • http://files.tersiaoosthuizen.com/uploads/1/3/1/6/131606027/2bc828.pdfIn PDF document text
    • http://files.homelesshaventv.com/uploads/1/3/0/8/130874102/47a2151b05eff.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/1/0428/9685/1111/files/45486272589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/95680984782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/actos_de_comercio_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/renukofakegavoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0049/4237/files/nirebajoduvojurifer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/25999379359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/sadutususujuxubomam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8311/1336/files/infiniti_g20_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/wixemezowemomidajudimal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/tidawudux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/past_perfect_simple_tense_exercises_with_answers.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_off000069df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5540 bytes
SHA-256: bc2eb6e36d9ade32cdeb87c0b56a761518cf01f2829155f20536b46bb229ede9
font_01_sfnt_off00007ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA4 9816 bytes
SHA-256: 9fad37d68b8980bd03af19f10ae7d3dac94e8aab02d20ec18fdecece43c6a076

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