Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb138e2a55574412…

MALICIOUS

PDF

45.0 KB Created: 2020-07-27 21:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e458a59b6ace5d7b3e37ddb622eb23c SHA-1: 0109c480b7017980c98d5581431c7afcb51ec257 SHA-256: eb138e2a55574412d9352e8484e8c7051b887dc3e8ef5724cf8b7f4d3973fabe
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'computational methods in environmental fluid mechanics pdf'. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO link farm tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=computational%20methods%20in%20environmental%20fluid%20mechanics%20pdf In PDF document text
    • http://files.jjtothethirdpower.com/uploads/1/3/0/8/130813141/faretitutarit_rufoboxal_guwadotipa_sevafasedelesuw.pdfIn PDF document text
    • http://files.highergroundinharlan.com/uploads/1/3/0/7/130740256/kukesorum.pdfIn PDF document text
    • http://files.keilifernando.com/uploads/1/3/1/4/131437457/vikozu_buzibepenafozig.pdfIn PDF document text
    • http://files.ifhabworkshop.com/uploads/1/3/2/7/132740764/gadetajezu-jodanadava-falevotife.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/1/0427/9320/5916/files/jugabidokivafolara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/xuviwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/xabiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/kesozurup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/tumalevem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/gewaropukozol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/tamogadowagubetazam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/11040436203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/28647302251.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 6

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_off0000705a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705A 5360 bytes
SHA-256: a12ca8c6076ae1d9004a3982c37167fef55d9a92f9b97f03fa7307a1ff83799c
font_01_sfnt_off0000826b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826B 10852 bytes
SHA-256: 252dbf6845991c8530acb4c5eb8c69d6b4c655f59dd83a65ec5db3fd75c1e876

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