MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a link to a known malicious redirector, disguised as a "concrete design handbook pdf". The document also contains a large number of links to external PDFs, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=concrete%20design%20handbook%20pdf In PDF document text
- http://files.sgsign.com/uploads/1/3/0/7/130740018/630566.pdfIn PDF document text
- http://files.wheelsoftimeinc.com/uploads/1/3/1/4/131453249/tubevaj-diwiwawas.pdfIn PDF document text
- http://files.christianmemoirs.com/uploads/1/3/0/7/130739740/riraxom_rodugarafo_kepinezoz_texemivikutuliw.pdfIn PDF document text
- http://files.bbsimon.com/uploads/1/3/2/6/132682570/tudijimavu.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/1/0428/9835/8432/files/denikiv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/8607/8369/files/77981458166.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8759/3632/files/738460863.pdfIn PDF document text
- https://xusogoresob.files.wordpress.com/2020/06/22826499175.pdfIn PDF document text
- https://jitazip.files.wordpress.com/2020/07/xojetit.pdfIn PDF document text
- https://nobusajufuta.files.wordpress.com/2020/07/94429244135.pdfIn PDF document text
- https://famunuguraj492377956.files.wordpress.com/2020/07/61619055123.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9806/2501/files/33753074398.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/7945/1289/files/71932352459.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2324/5216/files/12100801842.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4617/4877/files/54150461009.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/7208/6423/files/xawubapiguzoravawo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7148/0742/files/43973938796.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/0428/1511/files/fidafo.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
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00006483.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6483 | 5400 bytes |
SHA-256: b1a045bafc6e6602c4484d1e61abe110733abd34cb2a69c300440f5fc13220dc |
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font_01_sfnt_off000076d1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x76D1 | 10804 bytes |
SHA-256: f84ef8c3e19e3afb3dbda819027a8d16d830148933042fc655d399a99a9ccad4 |
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