MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to an 'answer key'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK directly indicates the presence of a malicious URL, and PDF_SEO_LINK_FARM shows a large number of external links, many hosted on Shopify. The primary malicious IOC is the redirector URL.
Heuristics 3
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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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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=answer+key+2019
- http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdf
- http://files.belleandbeaucompany.com/uploads/1/3/1/4/131438541/2048877.pdf
- http://files.cborbaphoto.com/uploads/1/3/0/7/130775561/1234226.pdf
- http://files.nationalhellenicsociety.net/uploads/1/3/1/3/131398259/1450b08.pdf
- http://files.wardwatkinsinsurance.com/uploads/1/3/1/4/131437484/3ca04.pdf
- http://files.professorwillis.com/uploads/1/3/0/9/130969819/35360
- https://cdn.shopify.com/s/files/1/0430/7173/3917/files/92611968966.pdf
- https://cdn.shopify.com/s/files/1/0431/9110/7742/files/gozinemukurobiwiz.pdf
- https://cdn.shopify.com/s/files/1/0436/2931/4206/files/71158905644.pdf
- https://cdn.shopify.com/s/files/1/0439/1901/6104/files/nosidajodilupulukoku.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
- https://cdn.shopify.com/s/files/1/0429/3401/0015/files/86281559892.pdf
- https://cdn.shopify.com/s/files/1/0430/8720/0418/files/tozazurigakipoxek.pdf
- https://cdn.shopify.com/s/files/1/0430/2775/9257/files/wulaboxem.pdf
- https://cdn.shopify.com/s/files/1/0435/9897/1038/files/53673730255.pdf
- https://cdn.shopify.com/s/files/1/0427/3229/0215/files/8505799719.pdf
- https://cdn.shopify.com/s/files/1/0433/8407/8503/files/52277269577.pdf
- https://cdn.shopify.com/s/files/1/0434/5911/7206/files/89634506612.pdf
- https://cdn.shopify.com/s/files/1/0437/6012/4061/files/6788102344.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/
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_006_off0000b119.bin572d7d9463a033d138de203e6633c31374e426a28428e5f5a256e20741a72a6e |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0xB119 | 8936 bytes |
font_00_sfnt_off0000a10c.bin275d2935b41f30c1001e7c9f13cf4a6a63125f46a227aab04e50302e3f794e9f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA10C | 4716 bytes |
font_02_sfnt_off0000ca43.bin42323f96fd6dfc37ab08af436043e016a9a0bc9c911e0187067a33a2aae36195 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCA43 | 16344 bytes |
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