MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a textbook and the malicious URL. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a seemingly benign document.
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/wb?keyword=holt%20mcdougal%20world%20history%20online%20textbook%20pdf
- http://files.justleeds.com/uploads/1/3/2/6/132681452/09b8f69e0a0bea7.pdf
- http://barepivef.amsnorcal.com/uploads/1/3/1/3/131379578/0de15436e1b699a.pdf
- http://wibof.lostlakefarmllc.com/uploads/1/3/1/4/131406437/5d63fb608bea19.pdf
- http://files.jacquelineclewis.com/uploads/1/3/0/9/130969190/7356956.pdf
- https://cdn.shopify.com/s/files/1/0429/2398/3001/files/movexefeni.pdf
- https://cdn.shopify.com/s/files/1/0430/7389/6615/files/free_machine_embroidery_patterns.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
- https://cdn.shopify.com/s/files/1/0430/6649/1042/files/jujopemaxu.pdf
- https://cdn.shopify.com/s/files/1/0430/5344/9365/files/81718431916.pdf
- https://cdn.shopify.com/s/files/1/0431/6954/6395/files/lamiludewanasilaluvuxofe.pdf
- https://cdn.shopify.com/s/files/1/0435/5158/8507/files/kipusofaxutaw.pdf
- https://cdn.shopify.com/s/files/1/0431/8520/9512/files/biomass_fuelled_power_plant.pdf
- https://cdn.shopify.com/s/files/1/0432/3459/0878/files/2547030770.pdf
- https://cdn.shopify.com/s/files/1/0429/2883/2675/files/ladijekafab.pdf
- https://cdn.shopify.com/s/files/1/0428/7604/3423/files/pixuzuxado.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000048bd.bin855dce1d2500b4ceaac9630858ca0ae2cf8c901510340273288ba7e468270619 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x48BD | 5996 bytes |
font_01_sfnt_off00005d16.bin6eeec7ca99d3becc19a4e46df3cc8a539516fbd94e5502f946b9be69a9053457 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5D16 | 9984 bytes |
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