MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a high ML classifier score. The embedded URL 'https://ttraff.ru/pify?keyword=date+sheet+hpu+1st+sem+2018' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting a lure for academic materials to redirect users to a malicious site.
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.ru/pify?keyword=date+sheet+hpu+1st+sem+2018 In PDF document text
- http://vitotipow.rattlerbands.org/uploads/1/3/2/6/132681218/6155ee6ba144a91.pdfIn PDF document text
- http://files.rainforestab.ca/uploads/1/3/2/6/132681698/valar.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/1/0431/9969/2958/files/27078867453.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7076/6750/files/46136738619.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/5832/3865/files/tafsira_quran_afaan_oromoo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/9605/4690/files/72529096765.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/3604/7522/files/manual_de_taller_chevrolet_captiva_2009.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5897/7178/files/jawajos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4565/0586/files/the_bedford_reader_11th_edition.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7193/8453/files/5_o_clock_in_the_morning_lyrics.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1313/4757/files/72363655024.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0451/8179/6503/files/rukesute.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8185/9225/files/classifying_rational_and_irrational_numbers.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00008a76.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8A76 | 5448 bytes |
SHA-256: 900fc5dc029c96d83d41f7b14e94701beedf3c3eeb2e8e7b2fa03a5fec68e49f |
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font_01_sfnt_off00009ce8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9CE8 | 15156 bytes |
SHA-256: 9ce9fbac73432efc09b6919a0dd9dea112c24a6ea729ed4b9579eed89c8e78b3 |
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font_02_sfnt_off0000cbcb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCBCB | 16300 bytes |
SHA-256: ff456598a0d5a628a83946827f5baf670cf3ce7f7629fd0cf03535faa26034ff |
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