MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous links, many of which point to an SEO redirector farm. The primary lure appears to be a 'back paper time table' which redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of redirector links suggests an attempt to lead the user to a malicious site, likely for further exploitation or phishing.
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.com/wb?keyword=bteup%20back%20paper%20time%20table%202019%20pdf In PDF document text
- http://files.factsoverfeelings.org/uploads/1/3/1/4/131406222/4398068.pdfIn PDF document text
- http://vozokegut.securevisionmediasolutions.com/uploads/1/3/2/6/132695675/pidana.pdfIn PDF document text
- http://faluk.sepamujer.org/uploads/1/3/2/6/132682663/2016373.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/1/0430/7750/1095/files/zokokuritekazinexi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0425/4615/files/que_es_almacenamiento_de_alimentos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/6148/6503/files/85131828800.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0454/6068/4952/files/upload_to_canva.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/8571/6886/files/secuelas_de_asfixia_perinatal.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/8553/6159/files/59500739291.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4098/7543/files/61512129863.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9911/2095/files/sheekkoo_afaan_oromoo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3495/8229/files/can_t_open_on_samsung_tablet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7074/9849/files/arilson_favareto.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/2458/7674/files/fudukupanofusuxideloluki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7036/5602/files/acls_guidelines_aha_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/5498/0505/files/dobenupibuwafizabopenil.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4205/4048/files/for_example_synonym.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_off00005f9e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5F9E | 5860 bytes |
SHA-256: 225eea6649adc12de1e006f2429405c4ed142633905a2b8ba44d2427f2d4acb7 |
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font_01_sfnt_off0000737a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x737A | 9908 bytes |
SHA-256: b5be99692d19e7b6741277d9fbecdb1eeb479b02abdade9d69ae94006f922d0b |
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