MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file contains numerous embedded links, many of which point to a redirector service that appears to be part of an SEO link farm. The primary redirector URL is `https://ttraff.cc/pify?keyword=calculus+of+variations+springer+pdf`, which is flagged as malicious. This suggests the document is designed to trick users into downloading further malicious content by masquerading as a source for academic papers. No scripts were extracted, and the document body was heavily obfuscated, limiting deeper analysis of the payload.
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/pify?keyword=calculus+of+variations+springer+pdf In PDF document text
- http://kepivuvam.crossfitremix.com/uploads/1/3/1/4/131453247/ruwabaje-fugoku.pdfIn PDF document text
- http://files.cleftstrong5k.com/uploads/1/3/1/4/131408245/lisolokikumisar_timixulaz_dezadazonowepef_tetoxafegat.pdfIn PDF document text
- http://gosofepe.bettysbunch.com/uploads/1/3/2/6/132680866/ce4ea9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0449/1057/5771/files/anemia_peru_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8336/6551/files/taxege.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/1567/3752/files/25787762861.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7808/1959/files/davojiduwu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0521/3854/files/lefudojudatexosulega.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6580/2903/files/vawejolupodafinajokazobu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9807/1450/files/87744318391.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1678/8900/files/avi_movies_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6274/7548/files/13310898641.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4790/1592/files/wipadajagonemi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0445/3256/4132/files/bodybuilding_diet_plan_for_mass_gain.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5122/0120/files/babalusivakolirenagiw.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/7608/4117/files/when_does_tentacool_evolve.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005e8a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5E8A | 5288 bytes |
SHA-256: 832b0e1b76d7c354766a86a9e3973204a7b5b6c23c6290428aa84a3b9007b52f |
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font_01_sfnt_off00007094.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7094 | 9992 bytes |
SHA-256: 85bcf634a4ea807dcc6573c4f1239d043ff0f603be13089978f133c32975cb54 |
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font_02_sfnt_off000092b8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x92B8 | 4324 bytes |
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176 |
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