Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff218c902780e1e…

MALICIOUS

PDF

44.3 KB Created: 2020-08-16 15:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bfed4513fc8491402a0a929d2c35517 SHA-1: 808bf4dbe5a3f95edf17dcd0e982bd1716188cda SHA-256: eff218c902780e1e2ff300acb59e1728a4072705693fc7db2ba86377a5772bb6
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to academic marks and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting the malicious URL, likely for phishing or malware distribution.

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.com/pify?keyword=ap+ssc+marks+memo+duplicate++2017 In PDF document text
    • http://files.aedsa.ca/uploads/1/3/1/3/131380258/0eb8f430b596ac.pdfIn PDF document text
    • http://files.fiordamalfi.com/uploads/1/3/1/8/131871419/badidud.pdfIn PDF document text
    • http://files.poetryandmemory.com/uploads/1/3/1/6/131607131/bdf4a1d.pdfIn PDF document text
    • http://files.hebsolutions.org/uploads/1/3/2/6/132683224/1330345.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/1/0427/6230/5702/files/guserodimojizupile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/6384265197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3144/5149/files/wabagadupazotitobidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8102/4159/files/22450387366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6299/5618/files/basogolukepipevapomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/xupubavadimul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8894/9927/files/blockchain_basics_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/96327577692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/gudibofutowofeguvazexitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.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_off00006efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 5676 bytes
SHA-256: 8488324fbf81c48896fa150517945392aef08cee905971834967875c83c7e773
font_01_sfnt_off00008233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8233 10084 bytes
SHA-256: 1981f37c49f7aa735cddd9b164b496c74686fc5adac9e49d68809b571e30acd2

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