MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=upprpb+answer+key+download+2020+pdf'. The document body, though heavily obfuscated, contains text related to 'answer key download 2020 pdf' and the malicious URL, suggesting a lure to download malicious content. The presence of a 'download button' heuristic further supports this attack pattern.
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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=upprpb+answer+key+download+2020+pdf In PDF document text
- http://files.educationsymposium2019.com/uploads/1/3/2/6/132682051/vedoposatafe.pdfIn PDF document text
- http://gedijixo.threefaiths.org/uploads/1/3/0/7/130776760/suvasidug_puwexikuropibe_tolokenu.pdfIn PDF document text
- http://files.epicfuncenter.com/uploads/1/3/0/7/130739922/1710475.pdfIn PDF document text
- http://files.rfvhorsecouncil.org/uploads/1/3/2/3/132302951/6585945.pdfIn PDF document text
- http://files.felixrarebooks.com/uploads/1/3/0/8/130813846/9617758.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/1/0432/2269/6098/files/kepizubonufadamel.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/1641/1547/files/97379779796.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/4184/8470/files/97890442442.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/4173/4311/files/98379202857.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/4768/2201/files/lozenokif.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0304/2216/files/emotional_development_in_early_childhood.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/7620/6240/files/34426039254.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/1967/2472/files/pibowodijuzeguvemibuvaji.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3303/3877/files/astronomy_book_free_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/3123/9588/files/lakawagepododanukebasi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6090/3582/files/90250405957.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0427/7148/0742/files/palobowuvopagobozirud.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000767d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x767D | 5696 bytes |
SHA-256: 031f1b20312ba081b69589c2a4ec8658d73bd498e4c72677692c42096fc2b1ef |
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font_01_sfnt_off00008a04.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8A04 | 9908 bytes |
SHA-256: 50c13719b5d264adb87a83246ccfc6d28bb6f7f517bf3e2b9d4f9e384071b099 |
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