Malicious PDF — malware analysis report

Static analysis result for SHA-256 6821599d7383efaf…

MALICIOUS

PDF

45.4 KB Created: 2020-08-11 13:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccf252a47ba44dd645d8e1faccd8337a SHA-1: b5ffa749818f3c9e2b4e89a8b28f7c51456c4f55 SHA-256: 6821599d7383efaf8480b13201e2cb410ec7d71dd9b9be93339da5f8405658ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links designed to appear as legitimate PDF downloads, but they redirect to a malicious domain. The primary redirector URL is https://ttraff.cc/wb?keyword=stp%20water%20treatment%20process%20pdf, which is part of a link farm strategy to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

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=stp%20water%20treatment%20process%20pdf In PDF document text
    • http://files.suezn.com/uploads/1/3/1/4/131406535/8028fb09c905.pdfIn PDF document text
    • http://nutur.allsaintssjvcomputerlab.com/uploads/1/3/0/8/130874254/c74c34211b8565c.pdfIn PDF document text
    • http://nunugubiz.grizzlybeatz.com/uploads/1/3/2/6/132681647/162dfa.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/1/0432/8436/5468/files/5037878211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/quran_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/21072752757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1205/5463/files/56420914036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/zetokigakefuzebadaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/73137447058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/bovegasawapexageliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/ncert_chemistry_class_11_atomic_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/xixeginewadivomawavimeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3951/1960/files/29235233475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/36445956360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/xupeposesoxutidulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/wizolotisoxenuragosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/20522950603.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 3

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_off00007301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 5464 bytes
SHA-256: a51042b3b0f848a8a9922254fa6da3fc7074200d588e7d9edd23d07d9114d7c8
font_01_sfnt_off0000858c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858C 10228 bytes
SHA-256: 51b27569fb8107c21c60ad881412f447288b51307f13e1815e7ddf68bd2dfa65

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