MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file contains numerous embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes text suggesting it is a 'backout letter template', likely a lure to encourage users to interact with the embedded links.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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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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=backout+letter+template
- http://rerivewu.addiev.com/uploads/1/3/1/3/131384714/mopevazisikumoje.pdf
- http://files.sarahminettemusic.com/uploads/1/3/0/7/130738870/6f9599.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0438/5079/3122/files/google_sheets_sumif_multiple_conditions.pdf
- https://cdn.shopify.com/s/files/1/0434/6245/9544/files/91047313910.pdf
- https://cdn.shopify.com/s/files/1/0438/8411/8171/files/manejo_de_varices_esofagicas.pdf
- https://cdn.shopify.com/s/files/1/0430/0269/1743/files/1666373324.pdf
- https://cdn.shopify.com/s/files/1/0435/9543/2099/files/cops_theme_song_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0434/6124/7138/files/nogosek.pdf
- https://cdn.shopify.com/s/files/1/0428/4134/2108/files/86341168088.pdf
- https://cdn.shopify.com/s/files/1/0431/2724/2903/files/bizatinob.pdf
- https://cdn.shopify.com/s/files/1/0433/7860/6229/files/niwazesuz.pdf
- https://cdn.shopify.com/s/files/1/0430/3526/3138/files/34394450817.pdf
- https://cdn.shopify.com/s/files/1/0430/8379/2545/files/64281500082.pdf
- https://cdn.shopify.com/s/files/1/0436/3337/7440/files/81428207007.pdf
- https://cdn.shopify.com/s/files/1/0430/1560/2337/files/wiwizabe.pdf
- https://cdn.shopify.com/s/files/1/0433/6074/7688/files/cation_exchange_capacity_practice_problems.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000061ac.bin6f0456cbfa03cc32a86e9306c8143fa19288bf2a7b5500b198fc5ebd29085b82 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x61AC | 5012 bytes |
font_01_sfnt_off0000729f.bin045f85a4162e0b6a9603717f46c5815d5dd1334a727a74b70bcb1fc91677fd82 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x729F | 10244 bytes |
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