MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=livro+de+administra%25C3%25A7%25C3%25A3o+estrat%25C3%25A9gica+em+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, further suggests a link farm or SEO poisoning tactic to drive traffic to the malicious redirector. The ML classifier also 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.ru/wix?keyword=livro+de+administra%25C3%25A7%25C3%25A3o+estrat%25C3%25A9gica+em+pdf
- https://cdn.shopify.com/s/files/1/0440/6509/5845/files/35447682897.pdf
- https://cdn.shopify.com/s/files/1/0432/1126/0062/files/algebra_1_volume_1_houghton_mifflin_harcourt_teacher_edition.pdf
- https://cdn.shopify.com/s/files/1/0429/0514/1411/files/tezijilusuj.pdf
- https://cdn.shopify.com/s/files/1/0429/6572/9429/files/sql_tutorial_tutorialspoint.pdf
- https://cdn.shopify.com/s/files/1/0464/2445/7368/files/whatsapp_new_version_without_play_store.pdf
- https://cdn.shopify.com/s/files/1/0431/7079/1573/files/vixopudunizakegijalalab.pdf
- https://cdn.shopify.com/s/files/1/0431/8268/6362/files/icivics_race_to_ratify_answer_key.pdf
- https://cdn.shopify.com/s/files/1/0438/3725/9936/files/adobe_activex_windows_7.pdf
- https://static.usrfiles.com/ugd/9cb927_320ba58c2a5a41b28a0c8f9274285728.pdf
- https://static.usrfiles.com/ugd/e5cbe5_d6459a2267d349b6b8d0c93251c10cb1.pdf
- https://static.usrfiles.com/ugd/02af14_9c24b1489beb4ab0926f8357c2648af5.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_off00007621.bin987644abe3cce1a1c8ca2cf8f6aa90e0713b13aae836cfd614f39581f67ee12a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7621 | 6084 bytes |
font_01_sfnt_off000089b6.bin0bdf40c47e4502144fd6e2577d962618fb302c458a61a9a372fc2200838fa207 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x89B6 | 12532 bytes |
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