MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a high number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/wb?keyword=challenging%20word%20problems%20for%20primary%20mathematics%20pdf, is identified as a malicious redirector. The document body, while containing garbled text, also includes this URL and other PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious.
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=challenging%20word%20problems%20for%20primary%20mathematics%20pdf
- http://difepen.taskgirlbayarea.com/uploads/1/3/1/8/131857419/fifujoterakegela.pdf
- http://tonof.schizy.org/uploads/1/3/0/8/130814297/libaberinarof_bujawipis_bovejutizexo.pdf
- http://rifazadat.valdezfoundation.org/uploads/1/3/1/8/131856149/wutigulitedipeso.pdf
- https://cdn.shopify.com/s/files/1/0429/2860/3295/files/beniwogaragugav.pdf
- https://cdn.shopify.com/s/files/1/0444/3049/1815/files/72528273066.pdf
- https://cdn.shopify.com/s/files/1/0432/7640/2854/files/3907547014.pdf
- https://cdn.shopify.com/s/files/1/0433/7316/6744/files/pdf_biography_of_nelson_mandela.pdf
- https://cdn.shopify.com/s/files/1/0431/5791/3754/files/seditir.pdf
- https://cdn.shopify.com/s/files/1/0430/2913/5521/files/food_bioterrorism.pdf
- https://cdn.shopify.com/s/files/1/0428/7453/6103/files/belimo_actuator_catalogue.pdf
- https://cdn.shopify.com/s/files/1/0435/7586/9599/files/torazuluwunometajobun.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_off000066fd.bincd77eca41ed3ed4e439ed4178bcde14b4d23a7ee3b59c4e5e1437a7f54674e34 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x66FD | 5808 bytes |
font_01_sfnt_off00007aa1.bin48fc1f51951bb103c25298d78ded37ba59a0ee9aeb3027f7257852eb74dcadc8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7AA1 | 10324 bytes |
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