MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text suggesting it is an 'answer key', a common lure. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL is https://ttraff.cc/pify?keyword=cet+2019+answer+key+mathematics, which is likely used to redirect the user to a malicious site.
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=cet+2019+answer+key+mathematics
- http://pipon.evapfaff.com/uploads/1/3/1/4/131437252/texag-munuba.pdf
- http://vekeded.if-airfranceklmva.com/uploads/1/3/0/8/130874524/6003601.pdf
- http://files.americansinger.com/uploads/1/3/0/7/130776060/6d3f398d55ff.pdf
- https://cdn.shopify.com/s/files/1/0435/2799/5552/files/76513493200.pdf
- https://cdn.shopify.com/s/files/1/0427/7826/3718/files/38024671756.pdf
- https://cdn.shopify.com/s/files/1/0431/7573/9553/files/robotech_rpg_download.pdf
- https://cdn.shopify.com/s/files/1/0431/5676/6882/files/30127725211.pdf
- https://cdn.shopify.com/s/files/1/0432/1925/5454/files/6645189180.pdf
- https://cdn.shopify.com/s/files/1/0431/1279/2225/files/giviridupufaselutolepam.pdf
- https://cdn.shopify.com/s/files/1/0436/0785/1171/files/59037023958.pdf
- https://cdn.shopify.com/s/files/1/0440/6778/2808/files/3677559317.pdf
- https://cdn.shopify.com/s/files/1/0440/8537/9237/files/zuxabajegiwuge.pdf
- https://cdn.shopify.com/s/files/1/0440/3150/8645/files/zopow.pdf
- https://cdn.shopify.com/s/files/1/0430/9280/3744/files/togotonawesidifananizuku.pdf
- https://cdn.shopify.com/s/files/1/0432/3213/3278/files/16634142462.pdf
- https://cdn.shopify.com/s/files/1/0440/2806/7990/files/21017598805.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_off00006d8f.bin283f1e4f203bc0a113a1b2f6091d7dbf726774ca4b64ad77e0d4c21ae0016edc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6D8F | 5652 bytes |
font_01_sfnt_off000080af.bin4f58fa04e77d7f6e1c0417e65f0d06c8680bed6eb0c0ead5071e45b9b2b54c5c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x80AF | 10236 bytes |
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