MALICIOUS
214
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 (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Approximation theory and methods pdf', likely a phishing pretext. The presence of malformed exploit streams and ML detection further supports 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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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=approximation+theory+and+methods+pdf In PDF document text
- http://files.andymanley.com/uploads/1/3/0/9/130969939/ranukexirugipesirow.pdfIn PDF document text
- http://files.ptutoysandmore.net/uploads/1/3/2/6/132681296/541e7c.pdfIn PDF document text
- http://files.kilsythcommunityfoodbank.com/uploads/1/3/0/7/130775429/kugiregorufudinizaka.pdfIn PDF document text
- http://files.caledoniaworks.com/uploads/1/3/1/8/131871912/e945fd66ede.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/1/0429/5180/3033/files/mazorageneterego.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9892/2392/files/gededobizotilurewija.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0979/2407/files/57620208061.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7279/0427/files/dapobi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/1746/9086/files/nibajanefi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/9827/4978/files/13858092564.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6394/3067/files/nerizutupug.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/8446/1720/files/78963177783.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/9612/1248/files/dufibedij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4609/9349/files/39551103259.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_off0000c31e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC31E | 5196 bytes |
SHA-256: 69971d74456748c8737a17434c164047740b10968f6e952f596f5d581d8db1db |
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font_01_sfnt_off0000d49d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD49D | 15296 bytes |
SHA-256: 8c27e12a0bcd72238971cc3801e89fd519c71f7bd4b976724940b497de57c967 |
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font_02_sfnt_off000105b9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105B9 | 16860 bytes |
SHA-256: d49dc8128b279f5a08ab43790f61111c4898d999f077c05ef735985cc265d754 |
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