MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains references to a 'worksheet' and includes the malicious redirector URL, indicating an attempt to trick the user into clicking it. The ML classifier also strongly flagged this PDF as malicious.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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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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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=worksheet%20for%20class%203%20evs%20ncert In PDF document text
- http://files.andrewmarkel.com/uploads/1/3/0/7/130739826/537f73448fd86.pdfIn PDF document text
- http://files.hoopstraining.com/uploads/1/3/0/7/130739996/digebup.pdfIn PDF document text
- http://files.storiainternazionale.org/uploads/1/3/0/8/130874233/792326a9b00041f.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/1/0438/5269/3669/files/bukojusof.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59577082877.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7298/8071/files/tadozutelasatasebewu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3553/3218/files/prontuario_cemento_armato_santarella.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1356/2787/files/8691127164.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0777/8717/files/ponunanebuzogabaledod.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0797/5335/files/84617643324.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2926/5574/files/47787563125.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2412/9952/files/pilewesokapatebagor.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0048/7332/files/29946407708.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8026/9477/files/73007653951.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4293/0842/files/61097810062.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005a00.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5A00 | 5272 bytes |
SHA-256: 50783ef99f6aeb1a93c39838ee047d00fd2f63db182d6218d54fb2fb38781a96 |
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font_01_sfnt_off00006bf5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6BF5 | 7144 bytes |
SHA-256: 1b7399783cab615e72726ee69b5abd8c87986855270aba2b66736f2ef3c29daf |
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font_02_sfnt_off00008013.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8013 | 10552 bytes |
SHA-256: 6689c834797ea0f2fa1eda6daf4bf27c3cfd87c8f5f12bd295222bf290fd39ad |
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font_03_sfnt_off0000a44a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA44A | 17492 bytes |
SHA-256: c1e6ffc75750c5739b28184ea098192487e1c360ff13057a509a4a6bbbe05e79 |
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