MALICIOUS
224
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to a known malicious infrastructure at 'ttraff.ru'. The document body, while containing garbled text, also includes the same worksheet title and the initial malicious URL, reinforcing the lure. The primary attack pattern involves directing users to potentially harmful websites through a link farm disguised as educational content.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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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PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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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/wb?keyword=crash%20course%20biology%20water%20liquid%20awesome%20worksheet%20answers In PDF document text
- http://files.coachinginyourcloset.com/uploads/1/3/0/7/130776370/cc603903632.pdfIn PDF document text
- http://files.goodstuffprimaryresources.com/uploads/1/3/2/6/132681204/lamumolop.pdfIn PDF document text
- http://files.addaihealthedu.net/uploads/1/3/1/3/131380618/2087346.pdfIn PDF document text
- http://files.wlcbands.com/uploads/1/3/1/6/131607712/2769e0d94.pdfIn PDF document text
- http://files.jessicadenham.com/uploads/1/3/2/7/132712005/molavavip.pdfIn PDF document text
- http://files.cailenfu.com/uploads/1/3/1/4/131437444/rutez_wubusaxofab_kajali_zuwogor.pdfIn PDF document text
- http://files.twoforestplaza-leasing.com/uploads/1/3/1/3/131378921/2856213.pdfIn PDF document text
- http://files.mastercreatorsadventureretreat.com/uploads/1/3/1/4/131437091/bizitesukoratinov.pdfIn PDF document text
- http://files.nessasgoodiesshop.com/uploads/1/3/1/6/131606280/gizemazilowujonawit.pdfIn PDF document text
- http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://guzebamukubu.files.wordpress.com/2020/06/kukafoxevekilipeloxa.pdfIn PDF document text
- https://gunurineso.files.wordpress.com/2020/06/vetinefupibosivezuxob.pdfIn PDF document text
- https://gapekapanad.files.wordpress.com/2020/06/61686672361.pdfIn PDF document text
- https://vezumore.files.wordpress.com/2020/07/28929223944.pdfIn PDF document text
- https://sivutis.files.wordpress.com/2020/06/soxolabanigab.pdfIn PDF document text
- https://duwadunox.files.wordpress.com/2020/06/81556021637.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43561311815.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00007c0b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x7C0B | 5780 bytes |
SHA-256: 0182a5759367d32cc0dd8c051d55ef262afd9a65b101a0b190d6cd9f82289f73 |
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font_01_sfnt_off00008f99.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8F99 | 9996 bytes |
SHA-256: 388c32ca9906552590088b3eee442d300213213c3ff6a8d2a9eb53e82e34455f |
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