MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains numerous links, including one pointing to a known malicious redirector at "ttraff.ru". The document body, though heavily obfuscated, contains text suggesting it is a lure for "Amcat coding questions pdf". The presence of a mass external PDF link farm indicates a likely attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.
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.ru/pify?keyword=amcat+coding+questions+pdf In PDF document text
- http://files.everythingalcoholink.com/uploads/1/3/0/7/130738785/3409601.pdfIn PDF document text
- http://files.kiwanismusicfestivalsj.ca/uploads/1/3/1/8/131871568/vitewufapedelo_luwavibi_sufajigo_sekinelukagu.pdfIn PDF document text
- http://files.workhorseexperiences.com/uploads/1/3/2/7/132740633/4859008.pdfIn PDF document text
- https://www.gamblingid.com/In 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/1/0433/0687/7080/files/78682713185.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/2674/1405/files/63036322952.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wabodenerevugibew.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/3013/3408/files/96101848328.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/8435/6507/files/78906831875.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0450/2369/0916/files/proyecto_de_investigacion_educativa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/3526/3130/files/35558725198.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2457/9736/files/11177692745.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1154/7037/files/tezojof.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/7005/3784/files/2673792685.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4433/8838/files/zabunijiwozalopinan.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2897/0647/files/archaeology_and_humanity_s_story_free.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_off00007c91.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7C91 | 5344 bytes |
SHA-256: 8efc5deb2bcc9c8593ee82ad38078f6385923cfab1fbe5f08b7fd9ed69e39d56 |
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font_01_sfnt_off00008e9d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8E9D | 16336 bytes |
SHA-256: 430245cc9af955d603c8c7d330abc3bd847af40aef3a71e1282a838b35288e4d |
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font_02_sfnt_off0000c13f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC13F | 4324 bytes |
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3 |
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