Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fa44023a2ea39d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-03 16:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15243c5785eaedace12f65620de17945 SHA-1: 5e69753129397c34087b6bb932d56e752805d8f0 SHA-256: 21fa44023a2ea39dfd68115349c592d73d1882df728c336328e1d80938312707
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Catia v5 full tutorial pdf' and the embedded URLs, suggesting a lure to a potentially malicious site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=catia+v5+full+tutorial+pdf In PDF document text
    • http://files.jsciresadv.com/uploads/1/3/0/7/130776103/tuvevexuke.pdfIn PDF document text
    • http://files.danbelmontmusic.com/uploads/1/3/1/8/131857983/gomisesesegib.pdfIn PDF document text
    • http://files.eratoalakiozidou.com/uploads/1/3/1/0/131071277/5dc7eb897eab6f.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/1/0437/2883/0625/files/lamewitavomuzel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/not_secure_website_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/82316264273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/vowakesakiresodapopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/reg_262_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/24864200489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1303/6439/files/rosef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9622/5432/files/kitchenaid_attachment_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/xuledobebagomefimafum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/97325629721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/73150905476.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_off00006c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 4944 bytes
SHA-256: 1b326766cfc1678d0f11f39d4bb7fdb10f1013558af687a49bddcaa6c1f10167
font_01_sfnt_off00007d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 9916 bytes
SHA-256: 43d20c2bccdf9d5a65ca986ce6e298af26ebcb0a7d3775cb29305477ae68097d

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